What do you mean "the 20 years you would need to get to full retirement?"New and better job offers won't stay open for long leaving many to have to choose between staying for the severance and forfeiting the new job offer or forget about the severance and get the hell out of FDX. If left to choose between half a years income by staying at FDX and the 20 years you would need to get to full retirement and that new job offer has a chance to get you there the choice then becomes pretty clear.
This is the new FDX. You'll be expected to drop everything and come running when the want you then booted back out into the economy to figure out for yourself how to survive..... until they call you up again.