It's easy, build more schools or recognize already great ones, and start to educate people that most lists of school rankings (USNews in particular) are mostly gamed anyway and are more or less meaningless...(or actually start to rank schools correctly) and then stop discriminating hiring practices.
There's the rub. You have powerful, entrenched players working to protect their own interests. Even more importantly, ignoring cues like an Ivy education reduces the SNR for hiring managers who are already overwhelmed by noise. Stopping discrimination will require them to do additional difficult, thankless vetting work.
In the tech world, github makes this relatively painless, though not entirely effort-free. Perhaps such a system could be extended to legal and regulatory fields? A central platform for open source laws, regulations, and debates would do the trick. The difficult part would be getting people to use it.
Maybe you could start by targeting law schools and debate clubs, giving them an easy way to visualize the back-and-forth of an argument, and then try to use that traction to move into the public sphere? I seem to recall hearing about a few sites trying to do this, but evidently none of them have reached critical mass yet.
/Ivy grad