The entire damned economy, and especially our notions of "productivity" are damned useless.
Fuck markets, fuck it all. Your job is useless. Human beings are an over-population of stray animals in need of a good spay and neuter program.
Seriously, most people toil at useless jobs.
Beyond basic food, shelter, and medicine, it's all pretty useless.
There. Is that better?
That's the trouble with your line of inquiry. There is no bottom. The only natural truth is that we are animals like any other. Our population is growing exponentially and we will solve that problem ourselves (unlikely) or Nature will (likely). We won't like nature's methods.
Personally I think education ought to be free. Going to school has a light environmental footprint compared to other human activities. The less people "contributing" to our fossil fueled industrial society, the better. Wouldn't it be great if nobody wanted to work in a coal mine or build and maintain coal fired power plants? Wouldn't it be great if nobody wanted to build internal combustion engines or drill for oil?
I think so.
Let them teach English! Let them play in their organic gardens! Let them miss work days because they were up all night having well-protected sex!
Economic productivity as we now know it is a very bad thing.
Education is a good thing. It will be an educated person, probably somebody way out in left field studying something "useless" who will lead us out of this mess. Or we will follow those responsible for this mess to lead us further down this path to hell.