Here's a reasonable tax system for you...

An opt-in tax or you could call it volunteered tax.
In this system the only person's who get taxed are the ones that voted for what-ever tax is proposed - and only for the taxes they voted for.

If some celebrity thinks it's a good idea to have a 90% income tax, good for them. Their income will be taxed at 90%. Or a business owner wants to pay 10% VAT, let them pay that. Everyone else who didn't want to vote for such a tax don't have to pay a cent.

Essentially every person should decide for themselves what a fair tax rate - and fair type of tax - would be for them.

I'm about 999% (Yes, one thousand percent minus one) sure that no government on Earth will ever want to adopt a system like that - because almost no-one will pay taxes...

But one can dream at least...