Anecdote: Because of a months-long labor shortage and being unable to staff operations even after multiple temp agencies were engaged, an employer somewhere in the universe raised wages to a floor of 15 per hour this past month. It used to start at minimum wage, then went to 8 in 2014, now here.
Everyone who was getting +1,2,3 dollars over that got bumped porportionally, so if you were at 15, you now got 17, if you were at 22 (only things like paramedics) you were at 25 etc.
Why? Amazon has a warehouse nearby. We've bled staff to them for years.