They want lower class people to never have more than that.
To expand a bit, liberals desire a scenario where people with the wrong level of credentials make $15-20/hr and people with the right level of credentials make 100k or more. Doctors can make six figures in a liberal’s world, but only if the pediatrician makes the same 300k as the surgeon. And plumbers should never be able to make 100k, or house cleaners, or other blue collar work that doesn’t necessarily benefit from unions.
And liberals hate the idea of merit raises or raises based on experience (except in a union seniority context), so they want to lock in lower class people at a rate that will be both their ceiling and their floor (with only adjustments for inflation). The liberals who dutifully promote “living wages” are the ones who’ll be holding the bag as jobs converge into those two massively income-unequal tiers based on acquisition of college degrees (even ultimately including what unionized labor remains).
Everyone should always just be paid “enough” for working, so no decisions have to be made about who worked harder, smarter or better to warrant additional pay. I didn’t really get it until I noticed how liberals promoting ridiculous minimum wages never talked about how people could get raises and promotions and move up in the ranks under that new system. And it’s because the people getting that $15/hr minimum wage aren’t supposed to ever have more, do more or be more. And the surgeon should just want to do the extra training for the same pay as a pediatrician just because.
And of course, people with a BA should always make more than high school graduates with some hustle.
ETA, some background on why I wrote this post that I thought I had put into the comments below but didn’t: My experience locally especially, but even on the internets too, with most liberal-type people who want the high minimum wage is what I wrote. They don’t think you have to worry about raises and stuff if you just make it high enough (“living” enough) to begin with.
I live in liberalland where they nickel and dime the daycare and nannies they have but “support” “living wages” for “employees of big businesses”.
When I lived in an upscale suburb, they didn’t want to pay for when the kid(s) were napping, even though the hourly wage they might offer was high, 15+ typically (I heard this both from women looking for nanny/sitter work interviewing with me *and* the nickel-and-diming women who hired them). I offered a little less but I didn’t nickel and dime and would pay for days we didn’t need them but which were part of the schedule. It was still hard to find someone because people can’t do math.