EU referendum, brexit and the aftermath

Totally, but how are you going to go about "those that have been left behind?"

Taxation and socialism?
Socialism has a track record so poor it's impossible to ignore or evade it.

This is an area where getting bogged down in semantics is important.

What is socialism and what is capitalism, and what do we mean by there application in modern societies?

There are plenty of successful European countries that I would cite as showing socialist policies clearly work. People often shout them down as not being "true" socialist societies. On the flipside, I struggle to think of any "true" capitalist societies.

But to specifically answer your question, yes. Taxation.