That is the biggest problem these days even here in Canada.
A few years ago at my old job I finally got a big raise from $14 to $24/hour. Then almost immediately reduced to part-time from full-time but the same duties. I toughed it out hoping for a reversal but one day I was abruptly laid off without notice. Then three people were hired to do my job.
It seems business have no realistic view of employees. You're merely an "FT" or "PT" in manager parlance.
Working minimum wage is more difficult than it was years ago due to it being stuck at a specific rate for decades. But hours worked is just as important and the trend to cut everyone to part-time was an even bigger disaster.
Even the Fight for Fifteen group has been fighting for $15 for many years. They should be adjusting the rate for inflation, by now it should probably be $17.