Everywhere I've worked in this country, employers have done their best to keep the work environment as stress free as possible (because of the serious financial consequences I described), yet people still get burnout. Your body doesn't separate work-stress from private stress, and not all stress can be blamed on your employer. A perfectly fine 9 - 5 job can push you over your stress limits if it is combined with a bad social situation, such as caring for a sick relative.