Quite apart from the fact that Jimmy Carter inherited his father's business, he receives around $500,000 a year in terms of pension from the USA for being an ex-president. He has been receiving that since 1981, i.e. for 40 years. So the tax tayer has paid Jimmy Carter $20 million during that time, and he is worth $10 million.

On top of that, he has made money from writing books, and he lives in a house worth $167,00, buys clothes at the dollar store, and eats of paper plates. So, yes, he saved the money.

I guess if someone paid me $500,000 tax free a year, I would also have substantial savings.

Basically, one cannot 'make money' and contribute to the greater good. That's because profit leads to inequality. Even if you look at Jimmy Carter, that money he receives as his pension for being a president, comes from the tax payer, and that means the tax payer is minus that money.