Biden estimated the bill should lead to an average monthly increase of $360 for certain public employees and their spouses and survivors. The outgoing president said more than 2.5 million Americans will receive a lump sum payment worth "thousands of dollars" to compensate for the benefits they should have received last year.

President Joe Biden signed a measure into law on Sunday that boosts Social Security retirement payments to some retirees who draw public pensions, such as former police officers and firefighters, in what the White House described as the first expansion of such benefits in 20 years.