Technology

Agreed with this. Even if one leaves the high performers out of the equation, if someone is consistently shirking work, and others are having to pick up the slack in order to make sure deadlines are met or that quality standards are reached, then that's a recipe for resentment if pay is the same. I don't think everybody on the team has to put in exactly the same level of work, and in a good working environment people tend to be pretty understanding of variances in output (both quality and quantity) as long as everybody is trying their best. Unless you've got someone that does significantly less than everyone else. To deal with that, you either need to have really good management, or pay rates need to reflect the actual work done.