Facebook loses much more money with this employee's departure (if their salary is indeed 250k like you're claiming) -- the cost of recruiting, training, and keeping employees is incredibly high, especially in tech.
Now imagine that OP inspires 100 employees quit -- now Facebook has a problem that it must address, because it's threatening their bottom line.
Now imagine that OP inspires 100 employees quit -- now Facebook has a problem that it must address, because it's threatening their bottom line.