What exactly would you like to see in America? What is your ideal?
Lay it out for us, specifically. Then we can use it as context going forward here.
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I would like to see a rise in the cultural consciousness. I would like to see the overwhelming majority demonstrate the will to earnestly embrace reason, and the courage to thoroughly commit to morality. I would like to see people shake off indoctrinated mind control in favor of lucid perception, and to see the truth and practicality of natural law.
This will necessarily result in the removal of support for coercive methodologies, in favor of rational discourse and true cooperative organization. An understanding and appreciation of fundamental human rights will see immoral solutions to life's challenges immediately removed from the table. The necessity for moral solutions will birth invention we cannot possibly fathom from our current perspective.
"When one is asked to speculate on the unknown, one should not anticipate pragmatic answers." - Dr. Dimitrios, Blood Beach (1981)
For this reason, there is no "system" being suggested other than this core commitment to moral rationality (and the willingness to physically defend against aggressors who do not make this same commitment). Free creativity will render the truest and highest expression of man's potential, and this may not look the same in every place, at every time. I imagine things would not change much at first... free-market capitalism will likely be embraced for some time (possibly hundreds of years), before the logic and benefits of a gift economy become ubiquitously apparent. Just my speculation.
In any case, there is no centralized body capable of addressing the needs and desires of all people everywhere through a unified system (again, not from our current level of consciousness). Precisely what will be devised is anyone's guess, and everyone's responsibility. In the absence of an immoral government (non) solution to every problem, man's imagination will awaken from its half-slumber and humanity will move into the next phase of our social evolution.