If someone gave me one immediate wish, it'd be to establish public banking in every county in America, move every citizen's money into it and have them only """reinvest""" that money into civic works.
No more overdraft fees. More of an incentive for faster transfers than ACH.
I also would want to let citizens vote directly on what services they'd like to have based on what the budget can offer to further discourage private banking. More publicly owned parks. More BUS LANES. More actual bike- and foot-centric traffic.
(This is more than one thing and would probably not happen, if started today, but it's a wish).