1. Who is going to take it? The government is a very bad guardian. Everyone from the former East Block can attest (me including). This literally happened here after 1944 and we still suffer the consequences. The political class became all-powerful as they controlled all the resources.
2. This will make people a lot less entrepreneurial and as a result - everyone will become a lot poorer. This also happened in my country between 1944 and 1989. Even the Chinese realised this can't and won't work and are currently heading in the opposite direction.
Really, fantasy is a great thing, but you have to think about the consequences. The Western World is heading off a steep cliff with this kind of thinking.