People acclimatize pretty well if you let them. We keep our house at 65F all winter, and set the AC for 85F in the summer and everyone is pretty happy. The payback period on a good sweater is not very long.
Setting for command is different from actual temp. Plus, humidity is rarely accounted for. A good AC that lowers humidity from 90%+ to 30% and this 30°C home becomes quite comfortable.
I've lived in extremely cold and extremely hot/humid places.
I cannot imagine setting the temp in the house that high.