There's a small story with mine
So, about a year ago my store was terrible. Terrible. Nothing got done, team didn't care, sales were never met, and BTS came and went and we became a focus store (I wasn't part of the store yet). Then leadership changed. All of it, or at least most of it. Of the STL, 4 ETL's, and 8 Team Leads that were there a year ago, only three team leaders remain (and one moved from AP to sales floor, that's how I got to this store.)
Once all the new leaders came, the store was basically put on notice, improve and change with the times or get out. SO much turnover, but the ones that stayed didn't get with the program, just did enough to not get fired. Of course the new TM's we bring in aren't always winners and there's TM's from before the shift that are actually really good. But when you talk about "dead weight" the vast majority of them are TM's from before the leadership change that don't like the fact that they can't get away with doing nothing anymore.