Seriously, a professional cricketer is his occupation, an occupation with a limited lifespan. He can obviously see he is getting toward the end of the line and is now attempting to rake in some easy cash in the twilight of his career. In many other occupations, if someone was throwing bucket loads of cash at you for minimal work, the majority would chase it, id think.
As much as he would love to bust his arse for all you guys, to keep you happy, it seems he has made a logical decision to look after number 1.