This is one of the problems that the Agile/Scrum methodologies address. The team is a self organising group where each individual commits to a certain amount of

This is one of the problems that the Agile/Scrum methodologies address. The team is a self organising group where each individual commits to a certain amount of work and the team periodically presents their results to management (aka the Product Owner). There isn't a layer where Management assigns individual tasks and measures performance, it is all done within the team and the team is judged as a whole. Which places the responsibility on the team itself to manage their own performance, which is what the article is saying should be the goal. If Ted isn't pulling his weight and getting through the tasks that he has agreed to do, it affects the whole team and there should be peer pressure (which can be positive) to perform better. The Scrum Master is there to remove any obstacles that are preventing him from getting things done. The article is talking about building a self managing team which is what Agile is all about.