> Maybe I should figure out how to do that.

Why wouldn't cash work?

There's basically no reason for me to carry cash in my daily life. Uber of all companies should be working to facilitate that trend, not impede it.

I think collecting tips on their driver's behalf would poke a big hole in Uber's claim that they are contractors.

That doesn't stop Lyft from accepting tips. I think Uber is just pushing back against tipping culture out of a desire to hypersimplify their user experience. It's a noble goal, but there's still a huge amount of pro-tipping social inertia in places like the US, which ends up making the process more complicated as people just tip in cash instead.