Marquis de Condorcet (1743–1794) was a was a French philosopher, mathematician, and early political scientist.
In 1794, as the French Revolution descended into despotism, his insight was
the secret that real power lies not with the oppressor but with the oppressed.
The weak enslave themselves.
You do not keep people oppressed by the use of power, at least not for long, you encourage them to enslave themselves.
You do this by convincing them that their best interests are served by your best interests.
We see this with the EU debate, the Brits can vote for their own freedom, and yet they have been brainwashed and led like sheep into believing that their interests lie with those of the elites, that instead of controlling their own destiny, their best interests are served not by democracy and sovereignty and self-governance but by maintaining in power an unelected elite.
Whether we are in or out of the EU, should make little economic difference, it does make a difference who is controlling the country.