If there is a mismatch then in-person offices will need to offer higher salaries and/or lower their standards to attract in-person workers. (Or put another way,

If there is a mismatch then in-person offices will need to offer higher salaries and/or lower their standards to attract in-person workers. (Or put another way, remote positions will be able to attract comparable candidates while offering lower salaries.) Whether that salary difference is +10% or +90% I would expect it to show up in salary data eventually, and that might be a more accurate indication of the magnitude of the mismatch than job postings.