Psychological effects of fortune for an NFL player

Since it´s draft season, I´ve been reading and watching content to get ready for the draft. I know part of the fun is to hear people talk about what makes players great or not, what makes them a possible superstar or, and, on the contrary, what is their bust potential. A topic that doesn't get discussed that often is the risk involved in giving young athletes so much money early in their lives. And yet, I think it is a huge factor on the success of a player and his continuity in the NFL. The best saints related example of that has to be Junior Galette. He was a great player and seemed like a humble guy until he got paid. Then everything went out the window.
How do you think teams try to measure the psychological effects of a 20 year old kid suddenly becoming rich, before drafting them?
Part of that is the interview process. The most famous example was the Colts asking Manning and Leaf what they would do with the signing bonus.

Manning said invest and study the play book.

Leaf said he would take his buddies to Vegas.

Colts drafted Manning and Leaf has been in trouble.