Bill Gates = $$$$$ Microsoft = Brains
This is simple Microsoft needs Bill Gates to finance their development, if he dies , gives all his money to charity, then Microsoft loses its war chest and it would have trouble riding through a storm. He is only essiential for his money, do you think he programs
18 hours a day?
Nah, i wouldn't worry about it, Microsoft has a few billion in reserve, Plus, their products are bought daily, how much profit do you think that is?