In general, tilt the system away from favoring money concentrations.

Favor small business formation (and worker coop formation) with higher SBA loan funding. Put required worker representation on corporate boards (like Germany) of larger corporations. Do actual antimonopoly enforcement. Tax large corps more. Create more public ownership of housing and infrastructure.. it's all pretty mundane well trodden and reasonable practice for good governance.

Exotic stuff would be government backed individual loan lines for citizens. The limit could be expanded on repayments but zero consequence if never repaid. The idea would be to open a window for entrepreneurship when right now, wages have basically squeezed out the possibility of most people starting any sort of business from savings. If you can make things grow, you get a larger limit. Basically decentralize loans.