The latest inflation figures have revived concerns that the Federal Reserve may once again be underestimating the persistence of rising prices, even as policymakers continue to focus on tariffs and geopolitical disruptions as the primary drivers.
William Luther, an associate professor of economics at Florida Atlantic University, argues that the central bank is paying too much attention to temporary shocks such as higher oil prices linked to the conflict involving Iran and the lingering impact of tariffs. In his view, the bigger danger comes from a broad increase in spending across the US economy that is outpacing the production of goods and services.
Recent data has sharpened that debate. The Consumer Price Index climbed 0.6% in April after a 0.9% rise in March, according to figures released by the Labor Department. Over the past year, inflation has accelerated to 3.8%, well above the Fed’s 2% target. Producer prices also rose sharply in April, suggesting additional pressure could still be working through the economy.
Rising Demand Is Outrunning Economic Output
Luther argues that the core problem is not supply shortages, but demand that has remained unusually strong across multiple parts of the economy.
Federal spending is projected by the Congressional Budget Office to rise 6% in fiscal year 2026, while companies continue pouring money into artificial intelligence infrastructure. Spending on AI data centres is expected to approach $1tn this year, a dramatic increase from levels seen only a few years ago.
Consumer activity has also remained resilient despite higher borrowing costs. Strong equity markets have supported household wealth, particularly among higher-income Americans, encouraging continued spending on travel, dining, healthcare and discretionary purchases.
Economic output, however, has not expanded at the same pace. Gross domestic product increased at an annualised rate of 2.66% over the four quarters ending in March, while total spending across the economy rose roughly 6%, according to the figures cited by Luther. That gap, he argues, is feeding inflationary pressure.
Luther believes the Fed’s policy stance has effectively become looser in recent months despite inflation accelerating. While the benchmark federal funds rate has remained unchanged since the end of last year, inflation expectations embedded in Treasury markets have moved higher. That dynamic has lowered so-called real interest rates, which economists view as a key influence on borrowing and spending decisions.
“The Fed is actually loosening policy in the face of higher inflation,” Luther said, arguing that policymakers have focused too heavily on temporary supply disruptions rather than sustained growth in aggregate demand.
Kevin Warsh Faces Pressure to Reset Expectations
The debate now shifts to Kevin Warsh, who replaced Jerome Powell as Federal Reserve chair earlier this month.
Luther said Warsh’s experience in financial markets and his previous support for reducing the Fed’s balance sheet could lead to a more aggressive stance on inflation than the central bank pursued during the post-pandemic period.
One option available to policymakers would be tighter communication rather than immediate rate increases. Luther argues that clearer warnings about excessive spending and stronger signals about future tightening could help cool inflation expectations before additional policy action becomes necessary.
The Fed also retains several conventional tools. It could raise benchmark rates further, increase the interest paid on reserves held at the central bank, or expand quantitative tightening by reducing its holdings of Treasuries and mortgage-backed securities.
Warsh may still face resistance inside the Federal Open Market Committee. Powell remains on the Board of Governors and could continue to influence discussions despite stepping down as chair.
The renewed inflation debate comes at a sensitive moment for financial markets. Investors have largely assumed that price pressures tied to energy and trade policy would ease later this year, allowing the Fed to move gradually toward lower rates. Luther’s argument challenges that assumption directly.
Markets Are Watching Whether Inflation Becomes Entrenched
The broader concern for investors is whether the US economy is entering another period where inflation becomes embedded in consumer and business behaviour rather than fading naturally as external shocks ease.
That question matters far beyond monetary policy. Persistent inflation could keep bond yields elevated, pressure equity valuations and increase financing costs for businesses already navigating a more expensive capital environment.
The discussion also reflects a wider divide among economists over the post-pandemic economy. According to research from McKinsey, global investment tied to AI infrastructure and digital capacity continues to expand rapidly, adding another source of demand to an already resilient US economy. At the same time, fiscal deficits remain historically high by peacetime standards.
For now, markets appear caught between confidence in continued economic growth and growing unease that inflation may prove more difficult to contain than policymakers expect. The next few inflation reports, along with Warsh’s early policy signals, could determine which side of that debate gains the upper hand.
