With a salary of $10m/year, handwave roughly half of that goes to taxes, you'd be making just shy of $100k post-tax per week. Call me a sellout, but goddamn. For that much money, there's a lot of places I could be convinced to put my faith into that I wouldn't otherwise.
It might buy loyalty for a while, but after it accumulates, for many people it would be "why am I even working at all" money.
And if they don't like their boss and the other job sounds better, well...