The United States finds itself locked in a financial and strategic relationship with Europe that neither side can easily exit. Alpine Macro strategist Dan Alamariu argues that American global dominance depends on maintaining European alliances, and that walking away would carry severe consequences for the dollar and U.S. fiscal health. The analogy of a loveless marriage is apt: both partners may be frustrated, but the cost of separation is far higher than the cost of staying together.
Why the Dollar Needs Allies
The conventional wisdom in some policy circles holds that the United States could shed its overseas commitments, bring troops home, and save money. Alamariu, a strategist at investment research firm Alpine Macro, makes the opposite case. He contends that losing superpower status would have “dire implications” for the U.S. dollar and for America’s ability to sustain its debt load. The logic runs like this: the dollar’s reserve-currency privilege lets Washington borrow cheaply from the rest of the world. That privilege rests on military reach, alliance networks, and the perception that the U.S. sets the rules of global commerce. Pull one leg out, and the whole structure wobbles.
The numbers behind that argument are stark. Data from the U.S. International Investment Position show the sheer scale of foreign claims on American assets and American claims abroad, underscoring how deeply the U.S. is enmeshed in global capital markets. Meanwhile, the U.S. Treasury’s capital flow statistics for mid‑2025 documented large net foreign acquisitions of U.S. securities. European investors hold a significant share of those flows. In plain terms, foreign capital, much of it from allied nations, helps finance U.S. government deficits and keeps borrowing costs manageable. A rupture in alliances would not just be a military problem. It would be a fiscal one.
Rubio’s Munich Gambit and Europe’s Pushback
The political friction is real, even if the financial ties make a clean break impossible. Senator Marco Rubio used his appearance at the Munich Security Conference to describe the United States as a “child of Europe” while warning of “civilizational erasure” facing the continent. The framing was meant to bind the two sides together culturally while pressing Europeans to spend more on their own defense. But the tone landed badly. Many European officials heard a sermon, not a partnership offer, and bristled at the implication that their societies were on the verge of collapse without American tutelage.
The backlash was documented by an Associated Press account noting that the U.S. National Security Strategy released in December had leaned on similar demographic and cultural language. European leaders rejected the premise that they face existential decline requiring American rescue and pushed back against what they saw as instrumental use of culture-war rhetoric to extract higher defense spending. The exchange illustrates the central tension: Washington wants Europe to do more, but its chosen rhetoric often alienates the very partners it needs. Alamariu’s point is that this kind of diplomatic damage is not cost‑free. If the alliance frays, the economic feedback loop hits American wallets, not just European ones.
NATO’s 5% Pledge and the Burden-Sharing Math
The practical expression of this tension is defense spending. At the NATO Summit closing press conference last June, alliance leaders endorsed what they called the Hague Defence Investment Plan, structured as 3.5% of GDP for core defense plus 1.5% for resilience and industrial base capacity. That combined 5% target is far above what most European members currently spend, and it represents a significant shift in how burden‑sharing is framed. The plan was presented as rebalancing, not as a precursor to American withdrawal, but it implicitly acknowledges that the current distribution of costs is politically fragile in Washington.
For everyday Americans, this matters because the alternative to allied burden‑sharing is the U.S. bearing those costs alone. If European NATO members actually hit 5% of GDP on defense, it would free up American strategic bandwidth for the Pacific, where competition with China is intensifying and where naval and technological investments are particularly capital‑intensive. Alamariu argues that a NATO breakup would weaken U.S. influence in Asia, not strengthen it. The logic is counterintuitive but sound: allies in Europe provide basing, intelligence sharing, and diplomatic weight that amplify American power globally. Losing that network does not just shrink the European theater. It shrinks American reach everywhere.
The Financial Trap Behind the Rhetoric
The most underappreciated dimension of this debate is how tightly U.S. fiscal sustainability is woven into alliance politics. Most commentary treats defense spending and government debt as separate conversations. They are not. The dollar’s status as the world’s primary reserve currency is partly a function of the security architecture that Washington built after World War II. Countries that shelter under the American defense umbrella tend to hold dollar reserves, buy U.S. Treasury securities, and price commodities in dollars. That cycle keeps demand for the currency high and borrowing costs low, allowing Washington to run deficits that would be more dangerous in a world where the dollar was just another big-country currency.
Disrupting that cycle, whether through alliance collapse or deliberate withdrawal, would force the U.S. to compete for capital on less favorable terms. Reporting in the Financial Times on cross‑border balances has highlighted how large and persistent U.S. external liabilities have become, even as global investors continue to treat American assets as safe. The BEA’s investment position data confirm that foreign holdings of U.S. securities dwarf U.S. holdings abroad. The uncomfortable truth is that America’s debt levels make isolationism more expensive, not less. A country running large deficits cannot afford to alienate the investors who finance those deficits, and many of those investors are in allied nations that also depend on U.S. security guarantees.
Stuck Together, for Better or Worse
One common critique of this framing is that it overstates European importance. After all, Asian central banks and sovereign funds are also major buyers of Treasurys, and trade with the Indo‑Pacific has grown faster than trans‑Atlantic commerce. But this objection misses how alliances, financial flows, and norms reinforce each other. European governments are not just bondholders, they are rule‑setters inside institutions that still shape global finance and trade. When they align with Washington, they help sustain a system in which the dollar remains central. If they drift away or hedge toward other powers, the symbolic and institutional impact could matter as much as any single year of bond purchases.
That is why the metaphor of a loveless marriage keeps resurfacing. The United States and Europe argue constantly over burden‑sharing, industrial policy, and culture, yet they remain bound by a web of mutual dependence that neither can easily cut. American voters may be tempted by promises to “come home” and focus on domestic renewal, while European publics may chafe at U.S. lecturing. But the underlying math of debt, defense, and diplomacy points in the opposite direction: disentanglement would be far costlier than repair. The more realistic project, suggested by strategists and by business leaders who gather at forums like trans‑Atlantic corporate conferences, is to renegotiate the terms of this partnership without blowing it up. The U.S. dollar (and the fiscal room it buys Washington) ultimately rests on whether that project succeeds.
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*This article was researched with the help of AI, with human editors creating the final content.
Grant Mercer covers market dynamics, business trends, and the economic forces driving growth across industries. His analysis connects macro movements with real-world implications for investors, entrepreneurs, and professionals. Through his work at The Daily Overview, Grant helps readers understand how markets function and where opportunities may emerge.
