Top 10 richest golfers

AP Photo/Wilfredo Lee

It's a well-known fact that there is serious money in professional golf, but being a golfer is a bit like being an entrepreneur. You have to perform well not just because it's your job to, but because you won't earn any money and won't be able to continue to perform at all if you don't.

But do earnings always match up to performance? Now Rory McIlroy has hit the number one spot in the rankings, can he hope to cash in on his best run of form?