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.

Now that the raise is due, it's time for [the employer] to pay up.

Who knows? He might also have been motivated to do an extra-special effort to get that raise.

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.

It's the only way people will take these positions because they tend to be short-term.