Never felt it right to be expected to pay the wages of someone not hired by me.
As someone ask, "you tip the cashier at Wal-Mart?".
I don't. Also don't tip the stocker or the guy who hands me a box of ammo.
Again, a reward for good service. Not a rainmaker paycheck. Just that tip that makes the, low wage + reward for good service = decent pay, equation work.
Parents who say they have good kids..Usually don't!