I think we need a new constitution based in criminalizing socially destructive greed.
I'd take an electoral system not created to disproportionately represent land owners.
That said, imho both are beyond pipe dreams until collapse. This place is bought and paid for, and capitalists are only fans of representative "democracy" they can purchase through their legalized bribes and propagandized, for profit media.
Reaganomics was a bullet to this country's brain, Citizens United was just pissing on it's cold, long dead corpse gratuitously. This place is just the bought and paid for launchpad and military for the market capitalists to spread/grow/metastasize their greed disease accross the globe since then.