I think the benefit when a well-run union and a well-run business negotiate is that employee satisfaction is up and turnover is down. A union can be a bulwark

I think the benefit when a well-run union and a well-run business negotiate is that employee satisfaction is up and turnover is down. A union can be a bulwark against employers treating employees like garbage because relatively high un- and underemployment means they have a steady stream of employees who won't say "no".