Think about it, what are taxes for? To pay for all the things we share as a people: government, roads, healthcare etc.
If we're getting an equal amount out of the system why is it fair to expect people to pay different amounts into that system. Think about it, If you go out for dinner with friends and all eat the same amount you wouldn't expect to pay the bill based on your incomes.
That's why if you really wanted a "fair" system everyone would pay a flat dollar rate, such as $5000/person. I realize that's not realistic but perhaps we could meet in the middle with a flat tax rate, which would mean rich people would be paying WAY more than poor people. Don't even get me started on tax brackets, you're taxing people for being successful? That's just legalized theft and beyond mental.
Also, why do we never question income tax? That's a relatively new invention, you're telling me I now have to pay money to make money and then ALSO to spend money? That's fucked up, it's double dipping by the government and it's immoral.
Eh, I disagree. Look at what happens when one small elite class has all of the money. They literally try to enslave the entire world, like they're doing now. Tax brackets and tax rates were an attempt to mitigate this and keep any one group of people from becoming disproportionately powerful. Yeah it is the government doing it, but ideally the government should be for the people by the people. Of course, the richest and most elite have found ways to evade these taxes, so the whole system doesn't work to prevent the types of evils we are seeing today.
That's why we need to decouple money and politics, of course easier said than done.
Plato came up with a cool system of "Philosopher Kings" I'd recommend reading up on where society allowed people to gain amazing amounts of wealth but those people could never be in positions of political power and if you wanted to be in politics or ethical position in society you needed to give up your wealth.
It's a pipe dream but it shows we can come up with solutions where everyone wins.