Does Government Spending Cause Inflation?

Mainstream economics generally views government spending as potentially inflationary, especially when the economy is near full capacity. The conventional view holds that increased government spending boosts aggregate demand, and if this pushes demand beyond the economy's productive capacity, it leads to rising prices. Many mainstream economists worry about fiscal deficits 'crowding out' private investment and creating inflationary pressures through excessive money creation or by forcing the central bank to accommodate fiscal policy with monetary expansion.

MMT shows that government spending can contribute to inflation, but only under specific conditions related to real resource constraints, not financial constraints. The key mechanism is that inflation occurs when total spending (government plus private) exceeds the economy's real productive capacity at current prices. As Mosler and other MMT economists demonstrate, a currency-issuing government faces no financial constraint on spending—it can always afford to purchase whatever is for sale in its own currency. However, MMT emphasizes that the real constraint is the availability of real resources: labor, materials, productive capacity, and technology. When government spending competes with private spending for these limited real resources, particularly at or near full employment, inflation can result. Importantly, MMT shows that government spending is more likely to be non-inflationary when there are unemployed resources and unused productive capacity. In such circumstances, increased government spending mobilizes idle resources rather than bidding up the prices of fully employed ones. The sectoral balance approach reveals that government deficits can actually be essential for non-inflationary growth when the private sector desires to save or when there's a trade deficit.