I'm not really sure of that - I've met several who have other jobs, some surprisingly impressive. My last Lyft driver was pursuing a doctorate in business management - previously he was a chip designer after getting his master's in electrical engineering. I've got a friend who drove for Uber for a few months while owning a SaaS business that did about $750K/year in annual revenue - he wanted to see what all the fuss was about, plus at the time they gave you a free iPhone with the Uber driver app preinstalled if you signed up. I've got another friend down in LA who regularly shares stories of interesting Uberpools she's been in, and there are a lot of screenwriters and aspiring actors in the bunch - which may fall into the "day job isn't enough to make ends meet" category, but they certainly have an entrepreneurial bent.