As with all corporate evils, it will require leadership from the top down establishing clear standards of behavior with strong enforcement. Simultaneously, external pressure via media, lawsuits, and missing key talent can be applied on companies not doing it or reinforcing those half-assing it.
Not sure I agree- because investors aren't in the same category as employers, it's harder for a founder to get any sort of justice for discrimination or harassment. AFAIK, the bar for a lawsuit is much higher.
Also, most of these firms aren't huge organizations- they're small management teams with a couple partners and associates / analysts. From what I can tell on Crunchbase, Binary Capital was just Justin Caldbeck and Jonathan Theo before it imploded.
