Generally the people that can leave of their own will are the people you don't want to leave though. You might save 20% or more on salary, but you also loosing far more in productivity.
High turnover only works when it doesn't take long for employees to reach a productive level. Now that the market is tightened and there isn't free money everywhere, companies that survived despite turnover are going to struggle as that cost becomes more obvious.
Generally the people that can leave of their own will are the people you don't want to leave though. You might save 20% or more on salary, but you also loosing far more in productivity.
High turnover only works when it doesn't take long for employees to reach a productive level. Now that the market is tightened and there isn't free money everywhere, companies that survived despite turnover are going to struggle as that cost becomes more obvious.