Is this an always occurance or is it temporary? Your extra commitment may have future bennifits, I recently spent 1. 5 yrs in a temp construction job as an inspector for a huge company project and I think I will get that promotion this year, My extra duty was noticed and I believe I will be rewarded with that extra pay for the rest of my career. An extra 6 grand a year for 20 more years is $120k!!! Think about the whole picture and this may be the best thing that ever happened to you however if you know for a fact that you are simply filling a void and no future money is in it than you should tell your boss that God only gave you so much time and the company is depriving you of alot of personel time that cannot be replaced or compensated for. Never Never forget about your family time, money is NOT a priority over family.
cheers, Kevin