The bills aren't the only externalities from this design decision. Worked in an office a few years ago, brand new state of the art everything. Even the light switches were so damn modern and 201Xs that the lights were controlled by a server somewhere.

Funny thing happened when you pressed both the on and off button at the same time[1], based on empirical observatgions, both the turn-on-lamp and turn-off-lamp processes would spawn, and they'd both race against each other, almost turning the light on, almost turning the light off. So we got flickering disco lighting until someone called a technician to reboot the server. Good times.

[1] of course on and off they were discrete buttons, rocker swiches are so outdated.

Yeah I think I'd rather deal with a server or two of my own getting overloaded than having some kind of huge unexpected bill.