In a future society, an STO economy would have to follow from the STO nature of those involved. In other words, if the people participating in the economy are good at heart, then the rest is piece of cake.
But trying to create an "STO" economy in our current world is trickier, due to the element of shortsightedness, getting off your life path and creating imbalance, and predators settling into key nexus points of financial control.
So it would be a matter of 1) including the right people in the financial network and 2) creating safeguards and contingencies against corruption and mistakes. I think this is increasingly becoming a possibility right now due to the general increase in awareness among aware people and what appears to be a synchronistic 'gathering' of such individuals into various networks in line with the more general Polarization Phenomenon.
In a 4D STO network, assuming there are still some physical limitations like having to eat and acquire food because 4D is still partly physical, each individual would be in harmony with the universe and with him or herself. So just as our lives in 3D can be scripted and coordinated in perfect harmony even though we may not see it until the very end, in 4D it may become a conscious part of ordinary living - everything harmonizing and synchronizing according to ability and request, a Garden of Eden perhaps.
Money isn't that bad if you consider it a more efficient means of bartering. The problem arises with banks, fractional lending, interest rates/usury, fiat money, unfair taxes, etc... where physical goods/services and paper money no longer correspond precisely to each other, the predators skimming off the cream and everyone else thinking times are just tough. I'm not sure this can be fixed on a large scale unless other factors like education, media, religion, etc... are also fixed, because it is these that keep people dependent, irresponsible, and chasing after illusory goals.
So our best bet, as mentioned already on this thread, would be smaller barter networks and communities where each individual serves according to his/her ability and the majority are aware enough to spot and squeeze out any corruption where it might arise.
To get from 3D corrupt economy to 4D harmonized economy, intermediate steps are necessary and I bet certain catalysts will arise to usher in each step of the way. For instance, bartering during times of economic and political oppression.
In the meantime, we can find independence in doing what comes naturally, what is most in line with our interests and abilities. Over time, reality tends to respond to this and synchronistically supports and rewards any who follow their heart...as long as they have the patience to keep pace. If everyone did this, harmonized communities would automatically come together.
Acquiring fringe knowledge is like digging for diamonds in a mine field.