Not only accountants but I have seen lawyers and doctors working very long hours as well. It is as they say part of the job. I have done that but not now, 5pm and I am off and as soon as I leave work I switch off and dont take work problems home.
In your early career you just get paid a salary, at the higher level i.e manager and above things like performance comes into focus and they get rewarded in terms of bonuses and other perks based on their performance.