The impacts mentioned by OP aren't predicated on companies hiring globally. Simply expanding hiring across the US (or even just your US timezone) will result i

The impacts mentioned by OP aren't predicated on companies hiring globally. Simply expanding hiring across the US (or even just your US timezone) will result in a significant drop in salary for your average role. Employers aren't going to drop salaries in the midst of a pandemic, but if remote work persists, salaries will drop substantially. It's simple supply and demand, and I'm sure there's data out there (for existing remote positions) that corroborates this.