I've had the proof that a system like that can be a boon or guaranteed self-destruction.
I've once programmed a bitcoin-like system where people would get coins based on how constructively they helped their connationals.
They could spend the coins to buy from several stores with whom I put up an agreement.
Each subscriber made a list of needs and could spend coins only to get those needs.
I tested it on a little local sample, 10k people or so, then extended it to 300k (nearest city).
The zone I released this program to are 90% nationalists.
When the whole thing started, it was great.
People would help each other, like helping an unemployed guy get dental surgery, taking a depressed person out for a walk in a park and a chat, helping people find jobs, rebuilding abandoned structures…
Then I opened up the same system to leftist territory.
They came in and started demanding coins for what they consider good deeds.
Such as giving money to starving children in africa which has no returns and is infact a loss for your people, especially when there are a lot of people in your country who needed that money to save their lives or families.
Helping "fight inequality" by basically taking away resources and rights off some people and giving them to what they perceive to be more meriting / in need.
Hell some went out to harass people with different beliefs and considered it a service to the country because it's "fighting against dangerous ideologies", that of course according to their own ideologies only.
Cherry on top, some wanted coins for abortions. Speechless.
Seeing as these things would give them no coin returns they started the usual tantrums claiming my service was essentially "nazi welfare" because it worked only if help was mutual.
So I gave them an offer: I would give them ten times the amount of coins that non-leftists earned thus far, and created an environment and new coin in which they could decide everything.
It lasted 4 months, then their reserve starved out because it was infact - as I warned them - taking money and throwing them away, and very discriminatory in that they would only help specific classes of people (which returned deeds only 0.23% on average).
Meanwhile the right wing coinblock rebuilt 23 houses to victims of earthquake in my country, helped old people pay medical costs, created a distribution network of items of primary necessity, and even built an entire structure (physical) out of a decaying school that would work on doing deeds for the local people.
Receivers of deeds were capable of repaying on average 42% of the received deed's value (as opposed to 0.23% of the lefty receivers) which continued to increase in time as the receivers were willing to give back.
The rightcoin block demonstrated that nationalism is sustainable, evergrowing, and naturally created a circle of pragmatic altruism that would feed itself through the concerted efforts of connationals to create a better world for their nation.
The leftist system - despite having tenfold the starting resources - only focused on egoistical needs (i.e. I give a meal to africans to feel good with myself, even though there is no return), ideological propaganda that spiraled into censorship, and benefited no one other than a minority of people who wasn't interested in giving anything back.
Then I got diagnosed and passed the project to others, but I will go down in peace knowing that one day cyberfascism might save the world.