>and reduces your competitiveness against other remote employers that don't try to squeeze 10-40% off employee salaries

Well, duh. Google paying its engineers X instead of X + 100,000 reduces its competitiveness against other employers too. Doesn't mean they should raise salaries by 100k across the board though. Companies pay what they must to attract the workers they need, why would they pay more? They're in most cases not a charity being run for the benefit of the employees. And for remote work, being remote is usually a huge perk for the employee so naturally it comes with a shortfall in somewhere else, such as salary.