I take it you live in a country where people are ok to see other people living off the street because they presumably "failed"? That's the only reason I can think of which would make it possible for charities to fit government action scale.I think this is very erroneous thinking. Just because a government currently does something, does not mean it cannot be done any other way. Nor does it mean someone against income tax is in favour of it not being done at all.
Imagine if someone proposed nationalising all food production to you, and you recoiled in horror, then they accused you of being OK seeing people starve on the street. It's dishonest.
What I'm not ok with is having people who use what we all pay for, then try to not pay for their part by evading taxes.
The very richest people do not pay income tax proportional to their wealth. The progressive taxation system is largely a myth - when you are very rich you have the means to find ways around byzantine tax rules and you will tend to tie up your wealth in assets.
If taxes is a problem for you, I'm pretty sure there are a lot of countries where you can move and that you will find adequate.
You could literally say that about anything a government does. If you don't like being sent to gulags, I am sure you can leave North Korea, etc etc. It's not much of an argument.