Yes, individual companies can use some of this type of information to hire high-quality underrated/underutilized potential employees; older people, people with

Yes, individual companies can use some of this type of information to hire high-quality underrated/underutilized potential employees; older people, people with no degree, people from non-elite schools, etc. that get passed over may make fantastic hires that others miss. There's definitely room for "moneyballing", and savvy companies would be wise to attempt to use this in their hiring calculus. Broad correction, though, seems unlikely to happen, whether attempts are done via the market or via legislation.