Dana has a problem dealing with things when he is not in a position of control.
With the exception of the "top 10" fighters in the sport, most of these guys need the UFC more than the other way around. The monopoly the UFC has over MMA means the only 6 figure paychecks are going to go through them.
For those who worked hard and rose up to become the elite of the elite, after a few 7 figure paychecks and big money endorsement deals Dana no longer has the power over them that he used to have when they were up and comers.
If you had an 8 figure net worth, would you take the risks these guys take after 10|+ years in the sport? With a wife and young kids at home?
How do you tell your mother than you're going to go get kicked and punched in the head for 25 minutes because you need a 4th Lamborghini? Just to "defend" a leather belt for the 8th time? There will ALWAYS be another challenger, no matter how many times you win. Eventually, somebody will turn your lights out. Just ask Silva.
I mean it's a big leather belt with a shiny gold buckle. Dana acts like GSP wants to keep the belt and retire, when I bet he really would have been perfectly happy just leaving it in the ring.
He's the greatest WW of all time. This isn't baseball where you can glide a few years past your prime by slipping into a DH role. If he's not 100% mentally and physically, he's at serious risk of becoming another Liddell.
Personally, I hope GSP walks away. It sounds like he has some serious health issues, both physically and mentally. If he wants to come back in a year or two, he'll still be under 35 and able to compete if he chooses.
Here's your belt, I'm taking some time off. I'll call you, maybe, but don't wait by the phone.