Earlier quoted context omitted.
Not all jobs are worth the same amount. Nannying is quite important but it is low skill (meaning supply of labor is high) and thus will probably command lower wages than semiconductor manufacturing.
I don't think its low skill/high supply that's the problem here. The fact is a nanny is only servicing one family and so their entire economic input must be a fraction of that family's income. Same problem hair stylist faces compared to a software developer. You can only cut so many heads of hair in a single day which limits your total possible income to a fraction of mine because a billion people can buy my software…
Furthermore, with AI becoming increasingly sophisticated, we might see a seachange in developer salaries with only the most talented and valuable devs getting massive increases and all the rest being made redundant. Leading us back to the low skill/high supply problem.