Making Uber pay minimum wage, making Uber pay expenses is good. The alternative is letting them ethically abuse potentially desperate workers (because they can). I'm definitely not big on regulation but I think this is an area that government can make sure the playing field is fair.
I don’t use these services, but when I see news stories about them they are usually foreigners - and I suspect they are supplementing regular jobs with this. Users I know swear by the program, but so would the rickshaw rider a century ago.