[dredmorbius]

If the productivity of less-skilled workers has not kept pace with average productivity, this was by design. It was not the fault of these workers; it was the fault of those who designed policies that had the effect of devaluing their skills.

From Baker's article.

[olvar_]

my point is that the value of the work is not directly related with its productivity but with its availability, which doubled during the last few decades.