Obviously it's not a problem for a charity worker to buy a suit or send their children to school. They're not "taking" from the charity any more than I'm "taking" from my employer by being paid some percentage of what I earn for them.
As long as they are effective for their cause and care then there's no reason why they shouldn't earn as much as a private sector employee.
It used to be fairly common for people to moan about parliamentary salaries in the UK. An MP earns on the order of 100K with expenses accounted for, which is like, enough to buy a small-ish flat in London. Good money, nothing stratospheric to someone who isn't stuck in a poverty mindset.
And if you leave it to the private sector you get Medicare-style problems.
It's a legit hard problem, deciding which group in a particular situation can use additional resources most efficiently.
If you think those taxes are huge it suggests that you don't understand how you could be paying less overall for the above mentioned things if you had a consolidated population driving costs down. or that your comfortable with inequality as long as you get yours.