You have it backwards. Silicon Valley salaries are not “inflated” nor are they unreasonably high. In fact even at large FAANG companies, engineers are underpaid relative to actual revenue contribution, it’s just that competition drives those companies to pay closer to a fair value wage.
Across the US, engineers are massively underpaid due to specious rent-seeking policies by employers who tether pay to cost of living (treating it like an allowance for employees instead of an earned wage).
This change where remote employees can earn the same high salary based on their value instead of being a paternalistic allowance based on their employer’s opinion of where they live and what they should be allowed to afford, it is a good thing, because all these rent-seeking companies acting like vampires on low-wage suppression due to location are going to have to radically change, get rid of their paternalistic attitudes, and start being fair with employees.