Bingo - you use perks like this to a) make sure your best employees would never, ever, ever consider leaving, and b) to make sure your next hire is as good or b

Bingo - you use perks like this to a) make sure your best employees would never, ever, ever consider leaving, and b) to make sure your next hire is as good or better than the existing team. If something like this takes you from being say in the top 20% of places to work to the top 2%, then you can be a lot choosier about who you hire.