> turning what used to be a fairly decent job into something that's barely enough to scrape by on

That hasn't been true in the US. In NYC Uber drivers make $30/hr and don't have to work under the existing exploitative Taxi system where they could actually lose money on an unprofitable day. Also, Uber has brought car service to smaller cities (e.g. Mountain View) where there used to be no Taxi system at all (in fact airport taxis would price gouge you for going SFO -> South Bay). Maybe Europe is different but I don't think you can make blanket statements like that.