I'd say the current banking system does an excellent job at money laundering and most major companies seem to play the tax system like a fiddle as to pay less taxes than a fast food employee.

So, what's left? Oh, the climate. Where to even begin here? Call me when hash function workers create smog in a small city. Until then, our industry seems quite capable of killing the planet by itself.

It's better for the world long term if people that care about it are not poor. So, do make money and improve the world in other ways. Clearly you can offset with good deeds whatever energy will be wasted.