There is nothing "today" that is different from history, government have always sought to impose taxes because it gives them power and helps them divide populations to increase their power. It's the entire point of government.
What is the problem with capitalism? Are you talking about an actual free market or the state run "capitalism" we have in reality? I'm not sure a society where the state decides the prices of things and picks and chooses winners is really "capitalism" but that's me.
Taxation is a massive problem. The sheer amount of waste the current tax regime when combined with the programs to redistribute that income of every nation in the world creates is insane.
The federal government of the U.S. spends $3.8 trillion a year. That's not even counting what the states and local entities spend. All while effective tax rates are closer to 50% or more. The federal government of the U.S. has claimed 900+% of all GDP for the rest of the century. People scream that taxes need to be raised even more in order to pay for everything when there's a complete disconnect between impact on the ground and tax consumption because of that massive waste as poverty rates, education, etc. have all stagnated or gone backwards.
You could eliminate the entire tax regime of every nation and every single federal government program, put in place a flat tax of 15-18% with no deductions and eliminate the silly income distinctions, and give every household in the nation $30,000 (through a prebate). And spend LESS. And every single person would be better off because they don't have to waste resources anymore doing taxes. Not only that but every single person in the nation would see a massive tax decrease because anyone with a job is already paying over 15% of their income in taxes. Even people on minimum wage. And getting absolutely nothing in return for it.
You can easily make this a government run insurance-type fee system. You pay 15% of your yearly income, you're guaranteed to have at least $30,000 every year. Want to pay another 1% for basic environmental regulations, just check the box and pay it on the bill. You want to spend another 5% on a massive military, go ahead. You want to give 2% to public schools, fine go ahead, but you can also just spend that on your private schools too. If you don't agree to this, you don't get the prebate but you get anything the others are paying for to have for everyone. If the program is only for those who pay, you'll get a bill.
Instead of a financially and politically destructive series of entitlement programs that create an elite class of rulers who decide who lives and dies and uses that authority to further its own aims you would have actual "social insurance" and almost nobody would have a job whose key focus is to see how much of other peoples stuff they can take.
But we'd never do that because there's no power in it. And if you can't wield power over others what's the point?