One way to do it is to pass a law for bidding asking for a tip on a debit or credit card charge. In other words, remove the tip line. If people want to tip, the

One way to do it is to pass a law for bidding asking for a tip on a debit or credit card charge. In other words, remove the tip line. If people want to tip, then they will have to tip in cash. Spinning around the screen is too easy and too manipulative.