If you come from a major position in the private sector you’re likely to have some potential conflicts of interest, not bizarre Trumpy ones where you’re clearly trying to rip the whole country off but as a natural consequence of your previous work. If we want such people in politics we need to give them some leeway on this. Somebody even mentioned the use of tax havens. To this I would say, if something is legal and you don’t like it, campaign to get the law changed.