I think it's pretty clear that both PP & KG have enough money to last 'em the rest of their respective lifetimes. At this point, they should be looking more at residual income, like owning franchise businesses, dividend stock in utility companies, etc, than in expecting the C's to pay 'em an exorbitant salary.
Thus, they should accept the fact that they're no longer spring chickens & re-sign with the C's at Vet's minimum. Let Ainge sign some big contract players, and then, provide that veteran's presence off the bench, and go for a few more titles between ages 36 and 41. I think this retirement idea is nonsense, Parish, Kareem, Miller, and Stockton played into their 40s. PP and KG can do the same.