Their business models can afford to pay a lot because these companies generate that much cash. They drive that much cash because software can be highly leveraged (whereas plumbing cannot). Having salaries come down to means shifting where the profits are distributed and allowing the company owners and investors to capture more in comparison to the employees. I don't see how this is better?
It's still not great, but I am thinking of the negative externalities of tying up all software developers in tech bubbles, and having such a highly inflated class of worker in your cities.
Taxing those profits more readily might be one way to make the value from these insanely profitable software plays be more fairly distributed across society.
