I don't believe the Clinton Foundation or public speaking business (which Bill also pursued) was built up out of nothing. What greater head-start could you get to begin building a public speaking business or foundation than to be either the former President or married to the world famous former President of the only superpower? The connections, the access to money and favors, the uber rich people (eg Wall Street) that want to buy your ear, it's beyond immense.

Uh, Trump was given tons of money by his dad and inherited tons more, and there's no conclusive evidence that he's had net gains on that money.