I'm convinced that the thermostats at work aren't hooked up to anything. They're just there for the placebo effect. My office, and the entire physics hallway, is a meat locker all year 'round. I pried the cover off the nearest thermostat and turned it all the way up, and... nothing. The only place in the whole department that is warm is the breakroom, which is practically a sauna.
In my employer's defense, they tried to do something about the situation. They gave all of us polartec jackets and blankets. I kid you not. And space heaters for all of the offices. They could save so much money if only the climate control system could be brought under control.