Some of the coolest demos from my Lean Six Sigma training were all about demonstrating that oftentimes the easiest way to increase the end-to-end throughput of your value chain is to find the team member with the greatest personal productivity and force them to slow down.

You don't necessarily even have to do anything more than that. Just impose the rate limit on them and they'll automatically and unconsciously stop doing all sorts of little things - mostly various flavors of corner cutting - that make life harder for everyone around them.