the minimum wage has not increased in a decade and real earnings have declined precipitously since the sixties for most americans who work longer hours for lower pay than ever. the rich world is used to profiteering, not pace.
"Wage growth is more mysterious."
Amazon and Walmart were faced with a rash of calls for unionization coupled with walkouts. wages were increased to undercut these efforts, but only as a last resort tactic of union busting. Covid ushered in a rash of unemployment which triggered personal debt in the form of delayed rent payments from eviction moratoriums that disproportionately applied to low-wage service employees. reopenings in these jobs exposed employees to the same low wages and deputized them all as mask enforcement officers to be harassed and shot at. this ensuing personal abuse that broke the camels back for the service sector resulted in many of them walking away to other opportunities when second-wave lockdowns ensued. time off means plenty of time to assess your alternatives in fields that dont scream at you for poverty wages.
"That means policymakers should focus on the labour supply"
Raise. The. Minimum. Wage. offer healthcare, parental leave, child care, and vacation for everyone. stop insisting everyone needs to go to college when theres a trucking and trade shortage, and for god sake stop referring to McDonalds as a "highschool" job to justify low wages when they open early and close late during school hours and the average employee is in their thirties.