I can only assume that you are confusing tipping for bribery. Tipping is not bribery. It is contract work. The person who serves you food gets almost nothing for serving you food. Instead, they are basically an independent contractor. They serve you food nearly without pay from the restaurant, and at the end you pay 15%-20% of whatever you spent to them. If they botch it up horribly or do great, you adjust up or down. If you refuse to reward your independent contractor with the accustomed tip, the punishment is that everyone thinks you are an asshole and said independent contractor (and anyone they talk to) is probably going to give you exceptionally shitty service if you ever come back under the assumption that you are an asshole who is going take their services for free. The reverse tends to be true if you tip well.
There are other cultural implications. Tipping is generally done with a little subtly in certain fields not because it is illegal or even discouraged, but because flashing around money and making a big deal of your tip is considered uncouth. It is all entirely above the board and the laws are written to reflect this. This is why you can legally pay a waiter almost nothing, but you have to pay someone who picks up trash minimum wage. The places where you can tip are very sharply defined both culturally and by law. You can and should tip a waiter knowing that it is legal, but you will get tossed in jail if you ātipā a government official or police officer as it is utterly and completely illegal.
Iāll give you that it is a bit archaic and obnoxious, but it isnāt bribery. I would happily toss the system and just roll the price into the cost of the food as other nations do. However, you are confusing your extreme and apparently total ignorance of basic American cultural norms and laws for corruption. It is just the way the culture has chosen to reward certain jobs. Other nations have different cultures around money. In the US you donāt haggle over most things. You just pay the price on the tag. In some countries, you haggle and are considered the fool if you donāt. That isnāt bribery either, it is just how another culture pays for certain things. Donāt like it? Donāt use the independent contractors that work for essentially nothing who operate under the assumption that you are actually going to pay the cultural standard rate for their services.