He specifically chose that his resignation would take effect today, because they a paycheck today. Gotta milk it for every last little bit of cash they can grab!
There are a lot of things worth criticizing him for but I don't think this is one of them. You and I would likely act the same if we had the choice of timing our resignation.
Considering these are bribery charges and "investigators found $480,000 in cash and more than $100,000 worth of gold bars" just at his home, I think he has plenty of money.