If you're at all competent, go work somewhere else
If you're at all competent, go work somewhere else
You emphasize "sustainably", but how is it more sustainable to give 500k/year to capitalism until you don't make that much / retire / die? In either option, that 500k/year is there until it isn't. With charity, you'd help more people but it would be no more or less sustainable.
In other words, be useful. You don't have to worry about "being good" or "doing good" though many do and it's quite admirable to do so. But that's not the bar you have to clear.
The bar you should try to clear is to be useful. If what you're doing all day is helping people have shelter, or raise families, or be more healthy, or have more knowledge, or even be entertained or amused, you're being useful to people.
If what you do all day ultimately serves to make people poorer, more divided, more addicted, and more unwell, then what you're doing is not useful, it's harmful.
If what you're doing all day primarily contributes, even indirectly, to making people's lives worse, then nothing you do after that will erase it. Arguments to the contrary are just rationalization.