A country without Money how it's work?
Drugs in the water supply? (Or in this case, drugs automatically encoded into all replicated food)
Tweaking of the human genome en-masse to alter basic human nature?
I dunno, but whatever it is, it's radical.
There was a time that several million people worked for no money in America. But it required a system of brutal enforcers, chains and shackles, whips and barbarous punishments, trackers devoted to hunting down runaways, breaking up families to crush people's will etc... and it so outraged people that the country went to war with itself to stop this.
But none of that matters in the weird world of ST. Not quite 500 years after Lincoln signed the emancipation proclamation, all of humanity is working for no money. Replicator drugs or mass secret genetic reprogramming.