Ergonomic bar stools?

I think people should be demanding ergonomic bar stools. Why is it that people who can't type or use a computer for more than five minutes without ergonomic chairs and keypaids and wrist braces and so on and so forth, can then go to a bar and get plastered sitting on a stool for hours at a time, despite inebriation? There's something about just squatting on that stool that is part of the bar/drinking experience. Come to think of it, I have seen stools with small backs to provide back support to drinkers.