Tip pooling is despicable
Your right, it unjustly lets employees who don't work as hard or properly do their jobs, benefit on an equal basis.
I usually tip a little less in these cases.
Very fair point, and why it's harder to do (and I think not advisable) in a larger establishment. My local pub is the first place I've seen attempt it to this degree but it only works because the owner insists everyone share the workload and everyone gets along. The staff are all happy with the situation and they work more like a team. It is a well run place, mind you with very hands on owners (that don't take tip money themselves when they're working).
You think people working on a team, with cash bonuses on the line, are going to put up with one of the team members slacking off? You think a person knowing that better service puts more money in his pocket is going to do a better or worse job? These aren't union workers getting paid scale to sit on their butts. This is pure capitalism. Results are rewarded instantly.