Same problem on my Lenovo. But if it's who I think it is...
HINT: it was daddys money
...that would be the reason.
No surprise that JFK was at the top as he stood to inherit his father's fortune - much of it illicitly gotten. The two Roosevelts ranked pretty highly as well.
Not many would have picked Washington to be number 2 but I've been to his Mount Vernon estate and it is really quite something to see. As with some other presidents, Washington's fortune came directly from his land holdings.
These days, most presidents make their big money after they leave office with "speaking engagements" and "book deals" which is basically a form of money laundering so far as I'm concerned.