Again, that's looking the wrong direction through the employee's window. If Google has offered a transfer to someone, then they are giving them a new job offer,

Again, that's looking the wrong direction through the employee's window. If Google has offered a transfer to someone, then they are giving them a new job offer, and it might be "take it or leave it", but the employee still gets to the chance to decide if any/no compensation changes are worth the offer. But if Google gives that person the ability to work from home as much as they want, but then Google chooses to cut their pay if they incidentally move, that's snooping on the employee's private life. What other snooping behaviors are they going to start engaging in? One employee could eat out a lot more than another, or an employee could choose to stop eating out frequently to cut their expenses. Adult children of employees can get jobs and move out. People moving within cities can find drastically different costs of living. You could end up with a financial windfall from an inheritance. You're arguing from the side of universal corporate surveillance of employees.