Wrong, inside a tribe there was "gift economy". Search about it. There were no people left without food, or shelter. And not because someone made them be like that. See first post. If it was "each for himself" - the tribe would have not survived the first pack of wolves or something.
You are in charge of handling cruise ships. The system produces food, clothes, some useful items like knives, and other stuff like that. Even some shelter. That's 15% of the work of today. So - 15% of the people work, the rest are free to do what they like. After some time (3 years), the next 15% work. And so on. There is no need for all to work. And everyone gets these basic stuff. The rest of the time, you are free to improve your life, travel, whatever.
Of course - there will be no more cars produced, unless you want to work for them as an extra. That's the module, you add to the system. What you can't do is force people to work for cars by locking up the food. They have food (the basics). Now they work for cars or cruise ships only if they really want. Want the Buckingham palace ? Gather more interested people and start building it. You have all the time in the world.
You agree - it's fair not to conditions anothers survival on him working for your dream, he may like other things, like playing football all day.
And a movie :