"I would prefer it if there were no income taxes, only sales taxes."

You're young and you still live under your parents' roof. Once you're supporting yourself fully, you will notice that people who make more money spend a smaller fraction of it because they can save and invest a larger portion. In plain English, that means that lower-income people pay more of their income in sales taxes than higher-income people.

Likewise for many sales tax analogues, such as cigarette taxes, gasoline taxes, utility taxes, and the dreaded DMV taxes. The word for this is called "regressive taxation", because the more money a person makes, the lower the percentage of income they spend on the things that are taxed, and the lower their tax is as a percentage of their income.