I set my thermostat to 16.5 (62F) in winter evenings and 19 (66) during the day. I don't do it to own Russia, I do it because I don't mind being a little cold and wearing more sweaters or a blanket, and because I don't feel like paying half of my paycheck to the gas company. Hell, for the longest time I lived in a place with no heating or insulation and the temperature would drop at 12C in the evenings. Let's not act like not keeping your house at 25C year long is some kind of death sentence.
This person is a doofus though. Ultimately treatbrained take born out of someone whose only effect on the world is measure by consumption.