Why Inflation Persists: Drivers and Central Bank Limits

The S&P 500 hovers near all‑time highs while U.S. consumer sentiment sinks to a 74‑year low, even lower than during 9/11 or the 2008 financial crisis. At the same time, the closure of the Strait of Hormuz has removed roughly 20 million barrels of oil per day—about one‑fifth of global supply—pushing Brent crude above $125 a barrel. This juxtaposition of market optimism and deep consumer pessimism creates a paradox that masks underlying inflationary pressures.

The End of the “Great Moderation”

For three decades, central bankers credited their policies for a disinflationary environment, but they actually rode a structural tailwind of cheap Chinese manufacturing and abundant baby‑boomer labor. The Phillips curve—linking low unemployment to higher wages and prices—was not dead; it was merely in a coma induced by China’s low‑cost output. As aging populations shrink labor force growth in China and the West, that hidden relationship reemerges, eroding the “Great Moderation” that once steadied global prices.

Drivers of Persistent Inflation

Tariff costs now filter through supply chains as inventory buffers dwindle, forcing businesses to pass higher expenses onto consumers. Labor markets tighten, and the “break‑even” employment level—where wage growth matches productivity—has risen, sustaining upward pressure on wages. Housing, which accounts for more than one‑third of the CPI, continues to climb because construction costs rise and existing homeowners lock in higher price levels, creating a structural “lock‑in” effect.

The Fiscal‑Monetary Trap

Baumol’s Cost Disease explains why labor‑intensive services such as health care and education keep getting more expensive: productivity gains lag behind those in manufacturing, so wages must rise to retain workers, inflating prices regardless of technology. Governments increasingly rely on short‑term debt to curb interest costs, raising refinancing risk and pushing central banks to keep rates low. This “selective inattention” to inflation—public concern spikes only after prices have already surged—feeds a self‑reinforcing wage‑price spiral that anchors central bankers to an unsteady policy footing.

Mechanisms and Explanations

When labor scarcity drives workers to demand higher pay, firms transmit those costs to consumers, reviving the Phillips curve dynamic that Chinese manufacturing once muted. Simultaneously, Baumol’s Cost Disease ensures that sectors like health care cannot offset wage growth with productivity, cementing a structural price rise. Persistent government deficits compel central banks to monetize debt, keeping rates low and further stoking inflation, which in turn erodes purchasing power and fuels additional fiscal spending—a reinforcing loop that defines the “Age of the Unanchored Central Banker.”