But wait - capitalism was ALWAYS (according to Adam Smith) the new, best system for social good - at least when the 1.0 version was released. The upgrades have all been shit - a few steps forward and many yards back as we gave up (or really got outbid by the oligarchs) governmental oversight, regulation and a meaningful, progressive tax code and other playing field levelers that were all meant to make capitalism work for the country as a whole.
I think a return to well-regulated markets is what's called for. Government should only be focused (internally) on reigning in corruption, monopolistic and anti-competitive behavior, collusion, anti-consumer and other "pro-business anti-society" behaviors. Government should be pro-"their" businesses when dealing with outside nation-states who appear to be trying to warp markets. Rule number one when a new law is proposed: is it designed to benefit society as a whole? No? Throw it out.
Corporations that don't fundamentally benefit large swaths of society shouldn't be given corporate status - if you want to grab all the cookies for yourself you do so as a private entity, with no shield of liability and no corporate tax rates. Corporate values should be ordered 1) customer 2) employees 3) management 4) investors - with penalties for deviation. Whistle blowers exposing corruption/illegal corporate behavior should be encouraged with a 10% fine award. Fines should be structured in such a way that forensic accounting of the infraction's potential benefit will result in a 3x penalty - it should *never* be worth it to gamble on coming out ahead even after a trial. Corporate bankruptcy should attach 50% of the assets of the top 5% of paid employees in addition to the liquidating corporate assets.
Return progressive tax brackets to Nixon-era and greatly reduce personal capital gains write-offs - capital gains protections should apply to $2m in personal assets and then only incorporated investment where corporate rules are followed; private hedge funds should be treated like straight income under the previously-mentioned tax brackets. Reign in state tax giveaways to business (with some allowance for impoverished areas/low-employment areas, etc.). Structure write-offs for corporate-wide benefits (IE: stock options distributed relatively uniformly) and eliminate tax benefits for things that target only a few top-level employees (IE: corporate jets for executives).
Finally - although this appears to be happening somewhat already - return to strong pro-union rules and union protections.
There are all sorts of things that would help capitalism return to the ideal Adam Smith envisioned. Just imagine what Sauron (Trump, Koch bros, etc.) would do and then do the opposite.