Nearly a million low-wage workers in 10 states will get a modest raise this year. In Rhode Island, a new law has raised the state’s minimum wage by 35 cents an hour, to $7.75, which will work out to an average annual raise of $510 for 11,000 Rhode Islanders. In nine other states — Arizona, Colorado, Florida, Missouri, Montana, Ohio, Oregon, Vermont and Washington — laws that peg the minimum wage to inflation will result in increases of 10 cents to 15 cents an hour, for hourly wages ranging from $7.35 in Missouri to $9.19 in Washington.

By contrast, the federal minimum wage has been stuck at $7.25 an hour since 2009. In all, 19 states and the District of Columbia set their minimums above that level, providing a much needed lift for the lowest-paid workers. But state efforts are no substitute for a higher federal minimum because the ability to earn a minimally acceptable income should not depend on where a worker lives.

Will Congress finally raise the federal minimum wage this year? It would be the least that lawmakers could do. In the fiscal cliff deal, lawmakers locked in big tax breaks for wealthy investors and for heirs of multimillion-dollar estates. At the same time, they allowed the payroll tax cut for low- and middle-income taxpayers to expire, without enacting new provisions to ease the blow. The lowest-paid workers will be hit the hardest. In the states that raised their minimum wage this year, much of the increase will be eaten up by the higher payroll tax. In the other states, paychecks will simply be smaller.

Efforts to raise the minimum invariably run into arguments that employers, especially small businesses, cannot afford to pay a higher wage. But the evidence shows that most low-wage employees work for large companies, which have largely recovered from the recession and have reinstituted generous pay packages for executives. As for low-wage workers at small businesses, many are waitresses and other “tipped” workers for whom the federal minimum wage is $2.13 an hour, where it has been since 1991. Clearly, there is ample room for an increase.