You pay them because your argument is “i should be paying more”.

It’s hard to take someone seriously when they say they should pay more tax, have every opportunity to pay more tax, yet choose not to pay more tax.

He's arguing that the system should charge him more and his class of citizens more. Why would he arbitrarily pay more if noone else in his cohort is paying more? Doesn't make any sense.

What you are saying is he should make a donation to the US government.

No, those are just weasel words. It’s setting an example by doing what you’re saying others should be doing.

It’s why we have the phrase “put your money where you mouth is”.

And it’s not a donation. It’s intentionally paying more taxes because that what you think you should be doing. If the law changed he’d be paying the extra money anyways.

Well maybe you could consider it 'paying more taxes' internally but in reality it would be classified as a donation otherwise the US government would give him a refund for overpaying his taxes. And to my prior point I don't see how that gets anyone else on board.

The law won't change retroactively so I don't see "If the law changed he’d be paying the extra money anyways." makes any sense.

Your argument is illogical because it implies that people should be able to alter the tax law by intentionally overpaying taxes.