Published by Instant Press on behalf of Fight For A Living Wage.
A cost-of-living adjustment holds a payment steady against a price index. It does not recover ground lost before the adjustment began, and it does not track the prices the recipient faces unless the index happens to match their spending. Those two limits explain why people receiving regular COLAs still report falling behind. The adjustment is doingwhat it was built to do, and what it was built to do is narrower than most people assume.
What a COLA indexes
Social Security benefits adjust annually using a variant of the Consumer Price Index, specifically the index for urban wage earners and clerical workers, known as CPI-W. The Bureau of Labor Statistics publishes that series along with the others at bls.gov.
CPI-W weights categories by the spending patterns of working households. Retirees spend differently. They spend a larger share on medical care and a smaller share on transportation and education. BLS also publishes an experimental index for Americans aged 62 and older, CPI-E, which weights medical care more heavily and has generally run slightly above CPI-W. Benefits are not indexed to CPI-E. The gap between the two compounds quietly over a long retirement.
Indexing protects a level, not a position
This is the limit people miss. An adjustment preserves purchasing power from the moment indexing starts. It has nothing to say about whether the starting level was adequate.
Take the federal wage floor as the clearest case. The federal minimum wage has been $7.25 an hour since 2009, according to the U.S. Department of Labor. Suppose it were indexed to inflation starting today. Every future year would hold its real value steady, and the erosion between 2009 and now would stay locked in permanently. Indexing freezes a position rather than correcting it. Several states do index their own minimum wages, which stops further decline without addressing the level at which indexing began.
The same logic applies to a wage. An employee whose pay rises with the index each year keeps pace and never catches up. If the pay was below the local cost of living when indexing started, it remains below it, adjusted.
Where the index and the household diverge
A national index cannot reflect local prices, and the categories that vary most by location are the ones that dominate a budget.
National Association of Realtors and Census figures put the median U.S. home sale price at roughly $400,000 to $420,000 in 2024, close to five times the median household income of about $80,000 that the U.S. Census Bureau reported for 2023. The 1980s ratio sat near three. KFF put total annual premiums for employer family health coverage near $25,000 in 2024, with the worker paying over $6,000 of it. Child Care Aware reports center-based childcare commonly at $10,000 to $17,000 or more per child per year.
Housing is also handled in a way that smooths it. Most of the shelter component of the CPI is owners’ equivalent rent, an estimate of what an owner-occupied home would rent for, which moves more slowly than either market rents or sale prices. A COLA built on that series responds to housing pressure late and partially.
For a figure keyed to your own county rather than a national average, the MIT Living Wage Calculator prices housing, food, childcare, health care, transportation and taxes locally at livingwage.mit.edu.
Most workers have no COLA at all
Automatic indexing is largely a public-sector and benefit-program feature. Social Security has it. Federal retirement systems have it. Some union contracts negotiate it. The great majority of private-sector workers do not, and their real wages depend on discretionary annual raises that may or may not clear inflation in a given year.
A raise below the inflation rate is a pay cut delivered as good news. That arithmetic is straightforward and it is routinely obscured by the framing, since the nominal number went up.
The part indexing cannot touch
Here is the structural limit. A COLA protects income, which is a flow. It does nothing for assets, which are a stock, and the distance between households has widened mostly in the stock.
Federal Reserve data on household balance sheets, including the Survey of Consumer Finances, shows how concentrated asset ownership is. The series are published at federalreserve.gov. A worker whose wage is perfectly indexed still accumulates nothing, because indexing matches consumption costs rather than producing a surplus. Meanwhile the price of the main asset most families use to build wealth, a house, rose against income until the ratio reached roughly five times. The indexed worker runs in place while the entry price moves away.
That gap between flow and stock is the mechanism behind most generational wealth gaps. A household that bought in at three times income has an appreciating asset and a fixed payment. A household entering at five times income has a larger payment and no asset yet. Indexing their wage keeps the payment affordable and never closes the distance, because the two households are not playing the same game.
Reading an adjustment correctly
When a COLA gets announced, three questions tell you what it means. Which index was used, and does it match the recipient’s spending? What level is being protected, and was that level adequate when indexing started? Does the recipient hold assets, or is the indexed income the whole picture?
A COLA is a maintenance mechanism. It stops a specific kind of decline and it was never designed to do more. Treating it as a remedy for an inadequate starting level, or as a path to accumulation, asks it for something it cannot deliver.
