Who's going to quit though? The people who care, the people who know they have better options elsewhere. The talentless hacks who still don't give a shit about the company but are willing to go through the motions for a paycheck? They're like barnacles you'll have to get rid of by scraping them off and using a blow torch. The way to get rid of underperformers is by firing them, period, there's no other hack or workaround that makes things easier.

If that's her plan they would need to be careful to avoid running afoul of the concept of "constructive dismissal". If you make the work environment so intolerable as to make someone quit the law generally treats it as if you had simply fired the employee.

Can most claim that actually having to go to work is "intolerable" if they've not so much as logged into the VPN? Probably not. But the stay-at-home moms who can demonstrate they've been producing while teleworking might have a leg to stand on there.