You're making an assumption here that no higher level jobs would arise. History tells us that is a fallacy. In 1800s more than 70% of the workforce was engaged

You're making an assumption here that no higher level jobs would arise. History tells us that is a fallacy. In 1800s more than 70% of the workforce was engaged in agriculture. Today it's 1-2% in the US. However, the others are not just sitting on their asses. There are jobs available today which simply were not conceivable back then (programmer, animation designer yadda yadda).