[chrischen]

With great power comes great responsibility.

If they can apply themselves to something that has greater economic benefit to themselves, and thus society, they are doing a disservice to society by underutilizing their abilities.

If the only person in the world who can cure cancer decides to be a janitor and nothing more, is he not greedy, or is he lazy?

You're misjudging them and treating them as if they are somehow stealing money through their startup(s). Not making enough money is just a way of saying they just feel they can contribute to society in a bigger way.