Star Trek was absolutely not communism, in that the State did not own everything. Sure, they owned the star ships and space ports and most of the stuff on them. But there were still farms and businesses and trade routes and mines and the State did not own any of that. They were much more efficient than that: The State owned the power production. The State was the only entity that made anti-matter, and without anti-matter, your star ship wasn't leaving the solar system. And if you couldn't leave the solar system, you had no access to the Andoran or Vulcan or Klingon markets. While on present-day earth, the dictatorships and kingdoms of the middle east thrived for as long as they did because the state owned the energy production, i.e., the oil. We are in the midst of huge changes in that regard, which is part of why the US government goes to great lengths to prop-up the Saudi dictatorship in order to protect access to their oil, despite said dictatorship being quite antithetical to nearly everything the USA was founded upon and is presumably supposed to stand for.
Militaries do no uses communist economics, it's dictated and centrally budgeted (i.e., planned). The notion that a pilot wants or needs to own his or her fighter jet is absurd at facevalue. In practice, the pilot, while presumably a volunteer, is nothing more than an employee.
And I don't charge my kids for use of the house because I didn't have kids as a means to an economic end; i.e., I didn't breed just to have free labor to use for my own purposes or to rent to others. So again, your notion that household economies are communistic are absurd.