They calculate how much it will cost them and add extra just in case you come along and know what you're doing.
Who knows? He might also have been motivated to do an extra-special effort to get that raise.
It's the only way people will take these positions because they tend to be short-term.
My guess is he will ask for the money in exchange for his resignation. You always look for every opportunity to negotiate.
If you're hot, you know you may only be in demand for a short period of time, so you negotiate the best possible deal. Severance packages have been bubbling up little by little in the last 10 to 15 years as executive salaries and compensation have been.
He took a hit and his career was not as bright as it was two years ago. To people who command very significant amounts of money, a misstep is very expensive.
Every person and company, including every employer and employee, is required by law to fulfill promises that it makes to another person, so long as that other recipient of the promise has reasonably relied on that promise.
