The better question is: what's the cost of the US's lack of social mobility. (A partial answer to this is in the wiki link in my comment, FYI. You should read

The better question is: what's the cost of the US's lack of social mobility. (A partial answer to this is in the wiki link in my comment, FYI. You should read it.) When you say "cost," it doesn't always mean dollars and cents. Honestly, who cares if shareholders have a few less dollars in their pockets if everyone else is better off as a result? That's the real problem, not realizing that dollars and cents aren't the be all and end all of everything.