It's just a sentence, not a detailed essay of my thoughts covering all the bases.
I was thinking along the lines of everyone working fulltime for a single employer. Uber drivers are contractors apparently, but if uber lets them work 40ish hours a week, I personally include them.
Basically, the response to all of your questions is if a single employer is paying them either hourly or per task and wants/needs/allows them to work full time, then they should get a liveable wage. If they suck they should be let go.
I'm sure there are exceptions.