The mechanics of monetary policy reveal a fundamental tension in Trump's tariff approach. When the US imposes tariffs on imports, less dollar outflow occurs—seemingly sound logic for strengthening domestic industry. But economic theory suggests the opposite: fewer dollars leaving the country means tighter supply relative to demand, which appreciates the currency. A stronger dollar makes American goods more expensive for foreign buyers, exactly the outcome Trump claims to oppose.
This contradiction has paralyzed the Trump administration's own messaging. The president insists he wants a weak dollar to boost exports. His team at the Treasury signals the opposite. Meanwhile, currency markets have obliged Trump's wishes regardless: the dollar has weakened 6% since the year's start, defying the theoretical pressure toward appreciation. Whether this reflects market skepticism of tariff permanence or genuine economic disorder remains unclear.
The historical precedent is instructive. In 1985, the Plaza Accord saw major economies collectively agree to devalue the dollar after similar policy tangles. Today's rumours of a new Plaza-like agreement suggest policymakers may be edging toward coordinated intervention. But the real issue transcends currency mechanics. El Salvador's bitcoin experiment—adopting crypto as official tender to stabilise a debt-ridden economy—offers a cautionary tale. The country sank $365 million into infrastructure and subsidies. Bitcoin's volatility destroyed the plan's logic: a currency meant to fight inflation through deflation doesn't work when people hoard rather than spend. Salvador now needs IMF discipline, not digital salvation. The lesson: monetary policy cannot be decoupled from trust in institutions. A weak currency reflects weak governance; no tariff or technological fix changes that.