That's why you need small-scale implementations or reforms of existing systems before you can get anywhere. Even in engineering the best methodology is to start by implementing a vital subset of a whole feature set before you try to build EVERYTHING
It's one thing to say that changing this or that institution will improve things. It's another thing to go full Marx and say that you have a theory of how EVERYTHING works.
And this is actually part of what inspired me to say that terms should always be given hardened definitions before they're given any weight at all. It is absolutely vital to quantify desired performance when you're building software or machinery. It should be doubly so when you're talking about the goals and methodology of a political movement, not only to give a standard by which critics can judge a movement, but also to allow it to succeed and gauge its own success (or more often lack of it).
This will sound a bit mba-ish, but according to a book I have called "Superconnect," it's important to have a wide array of weak connections. If all you have are strong connections to other people, even if you have a LOT of them, that will probably end up stunting the growth and development both of you and the people you work with. And it seems like all the utopian philosophies have in mind a society in which every interpersonal connection, whether of master/slave or worker/comrade to worker/comrade, is "strong." And if you look at history, this is born out. Greece was built on strong relationships and well-defined roles, and it failed to grow. Rome, on the other hand, had very loose coupling between the different classes and it grew very stably until the Imperial era, when all power was consolidated in the hands of the army and later the Emperor and any separation of concerns was destroyed.
You also see this in poor communities in the US of all races. Whenever their community is too tightly coupled and lacking in loose connections to the outside world, there is great poverty and lack of education. Everybody needs a buffer of people they kind of care about and kind of don't. It's maddening if everybody has to live like Communists, perfectly in touch with all those who they come into contact with.