The EU was set up to be a mega Socialist state. It looks like many people in the UK recognize that and are trying to change course. The EU would collapse without the UK, France and Germany.
It’d collapse without the latter two, certainly. Problem is, those two are wholly dedicated to it.
People on the whole don’t realize that the UN’s charter is a clone of the 1936 USSR constitution, and that the 1957 Treaty of Rome, which established the second iteration of the EU (called the European Economic Community) declares in its preamble “accordance with the principles of the Charter of the United Nations”, thereby cementing socialism that far back in its existence.