So let me ask a question. When you buy a home with all your life savings, does it become yours? What makes it differ from the soviets? I mean, obviously they recorded your rights to the building on paper, and now they record it in digital databases. But is it REALLY that different? You don't truly own either. It's all the government's promise to let you access it and keep away whomever should not access it, until they don't.
The only thing you truly own is bitcoin. The rest are promises.
Freedom is the answer to your question. Communism control the financial freedom of its citizens through setting rules and limits on what you can use which means you will have the same properties even if you work harder than others.
On other type of government such as democracy, people have a freedom to do whatever they like and live on their own in exchange to paying taxes to the government that run the country public services.