Apple pays employee x, Google offers x*1.2, Apple could retain by offering x*1.2 (or more). Apple instead decides to collude with Google to not poach from each

Apple pays employee x, Google offers x*1.2, Apple could retain by offering x*1.2 (or more). Apple instead decides to collude with Google to not poach from each other. Now all companies everywhere decide to do this. Wages get fixed.