It wont happen. In addition to what gooch said.
Politics also influence money.
To become President you must be 35 years old. If your serious you must gain political experience. In doing so their earning income will already be above 100,000. Congress, Senate, even many mayors are above that income.
As for investments anyone with the stamina to get out and meet people who will either help them in their sincere cause to improve The USA, or their quest for the presidency will be exposed to quality investment advice that will boost their their other income.
If your going to make a difference your going to have something to say. Public speaking and book writing will push you well over the 100K income. Obamas first book made him 2million right off the bat. And he moved Uptown here we come.
If you had a friend who you felt honorable enough to become president you would do all you could to improve his or her chances of making it. So will others and their income will grow.
What the real question is can someone with true desire to improve the country for the sake of the country make it to President without becoming tangled in the trappings of success? This also is not likely.