Big Show doesn't surprise me at all, when he jumped to WWF he signed a ten year deal worth something ridiculous like $900k a year. Add to that PPV bonuses, house show payments, tv show payments, merchandise sales etc and you have a massive income. Plus when he returned to WWE a few years back he would have been on a great deal then as well since WWE really needed him.
Kurt Angle is the biggest shock for me, no way he is worth that much. He hasn't been in the business that long compared to quite a few others on the list, half his time has been in TNA which would be paying him less overall than WWE, he has been divorced so that would cost him a bit and finally he is a nutcase and therefore wouldn't be good with money.
Undertaker would be worth a lot more as well. Yes I know that he is only part time now but he has been at the top for twenty years earning huge PPV bonuses the entire time. Plus he has a side real estate business as well so would be earning plenty from that. If I remember right at once stage he was renting a place to Brad Pitt and Angelina Jolie and the place was worth a few million.
If young wrestlers see this they should look at Hogan and Flair and say that they never want to be like them. They were guys that were at the top of their game and have been stars for decades but stupid business and personal decisions ruined everything.