If we're being pedantic, investment income comes from a bunch of people who trade pieces of paper for a living deciding that a particular piece of paper is now worth $1 more today than yesterday. Well, okay, it's not paper anymore, just entries in some computer database in New Jersey or Delaware or something.

Investment income--in the form of capital gains--isn't coming from profits, it's coming from the mass delusion in the value of stock assets (which is somewhat correlated with profits, although the existence of stocks like SpaceX or Gamestop show the possible disconnects).

If you wanted to complain about the salaries of billionaires, or the stock grants on the other hand... but you said investment income!