top 1% of earners pay approximately 42% of the total federal income taxes. The top tax bracket pays 37% of the money they earned to the federal government. In some instances when combined with social security and state taxes they pay half of their earned income to the government.
Lowering taxes on corporations makes the US competitive w/ other nations which attracts talent and investors worldwide. Look at the growth of Texas and Florida. Why are businesses moving there? Because no state income taxes.
Lowering taxes on citizens is also business friendly because it provides more money to spend or the smart ones invest the additional money. In addition hiking taxes on the rich kills small businesses.
Lastly, more taxes means more government spending. More government spending is directly correlated to higher costs of goods and services.
Some extremely rich people like multi millionaires and billionaires do not collect income. They have investments. And you can not tax unrealized gains on those investments. If there was a tax on unrealized gains, then our Economy would collapse within a month followed by the world economy