Why would someone buy a company at a huge premium if that premium provides each employee financial freedom to leave, thus destroying the value of the company up

Why would someone buy a company at a huge premium if that premium provides each employee financial freedom to leave, thus destroying the value of the company upon purchase? We’re all disappointed with the inequities in reality on some level, but what would you suggest otherwise? Do you at least recognize that a buyer would likely pay significantly less for a company if paying more meant employees (its most valuable asset) could just walk up and leave?