You are buying the premise that the government needs more money. They already take over 23% of the GNP. And that’s just the federal govt. Add in all the state taxes and you get around 30% of GNP that runs government at all levels. ...... And they want more. Cave to the notion that “it is only the rich people,” and eventually the government will get more from you as well.... and more and more. They won’t stop until the people make them stop.
For some reason, the voters understood that today yes the wealthy would pay the income tax, but eventually the threshold for "wealthy" would get them, too.
I've never understood the American voter. Sometimes smart, mostly stupid. But upon occasion they do the right thing.
Disclaimer: California voters ALWAYS do the wrong thing. At least over the past 30 years.