I don't see that modernization or automation have been kept back in the US due to unequal wages.
They are "kept back" until the exact moment they become cheaper than human labor, then they effectively take over.
> High salaries for high-skilled labor creates inflationary spirals for things like housing.
High salaries for anyone create inflationary pressures. In fact, high salaries for a relatively small group would do this far less than paying everyone more, as the article suggests.
I'm wary of government intervention in the market because every case I've examined deeply enough turned out to be a failure.