I am not sure about all of those, but Helfrich, Wilson, and Chryst never had HC experience. However, the market conditions have changed, and coaches know that you can make more than that. Helfrich also has the backing of NIKE in everything they do at Oregon, and expect him to get a big raise when his contract is due. One of the complaints by IU fans is that Wilson and the staff are underpaid. He has issues, and fans shake their heads at some of his decisions, but there is concern that another school (in a Power 5 conference) will come calling with bigger money.
The Mark Helfrich one was more of a joke than anything.
And that's great for IU. Wilson is a coaching enigma - he's done a lot of great things there, but it's a tough place to win. That being said, I don't think we're worried about another school calling with bigger money with Hazell.