What is the business that you own?I'm not talking about any increase, I'm talking about forward a fair part of your income to your workers, if you aren't doing this, you do not deserve to run a business. This is what happens in the civilized world: have to rely on a unstable income (tips) is not. Tips should be an additional amount at the top of a fair salary.
Don't be greedy and pay your workers adequately, this is my point, and it's not just my point of view it is the only right thing to do.