Ok, maybe that was harsh.
Every wonder why there is more and more un/underemployment? It's because we can do more with less. By eliminating rote jobs we gain efficiency. The utopian ideal envisioned in the 60s is that we would all be working 10-15 hour work weeks by the 90s through automation and computer technology making things more efficient.
What they completely missed is that a human will trade roughly 2000 hours per year of their life to make enough money for food and shelter. Computers and robots don't really matter, it's just that each human can produce more stuff for those 2000 hours. There is no need to let them work less or pay them any more. You just need fewer of them.
Which is an obstacle trivially removed by a bit of well understood government regulation. And if the 60's economy had kept going through today, we would probably have that already.
But a funny thing happened on the way to a worker utopia: Foreign competition became a real threat, for the first time since WWII. Instead of a clamoring to reduce working hours, there was a clamoring to free businesses from regulation so they could compete more effectively with whatever nation seemed ready to eat or lunch.
Without government controls businesses do whatever they think is more profitable and it just cheaper to pay fewer people to work 40 hour weeks than it is to pay more people to work less. Benefits and infrastructure costs scale with employees, not the number of hours they work. It's even better if you can scare them into working more than 40 hour weeks while still only paying them for 40 hour weeks.
The exception is low paid hourly workers, where it is cheapest to limit hours to part time so you can dispense with paying any benefits at all. Now since these positions are almost always service roles with no foreign competition, you might think that something could be done with such travesties. But no such luck. Government controls would ruin us all. After all, if we paid pizza delivery guys more then the Chinese would take over the pizza business. Or maybe it is because other businesses would become uncompetitive if the cost of pizza went up.