Even at the regionals, you will rarely see an FA not tip (I can't remember ever seeing one in 10 years at a regional) and the FAs make peanuts. It seems to be even money though on whether a captain will tip. It's simply embarrassing when the highest paid member of the crew is the one always making excuses about why they aren't going to tip or that they aren't going to make sure they have cash "just for tipping."

I'm with CBreezy, I make sure I have enough cash for tipping and if I mess up and don't have it then I get to an ATM so I do.