I disagree. The value of the pound plummeted as a result of Brexit. So relative wages might increase in future, but there is no guarantee that it will make work

I disagree. The value of the pound plummeted as a result of Brexit. So relative wages might increase in future, but there is no guarantee that it will make workers any wealthier overall. Of course you might argue you only care about relative wealth, but then you have to worry about inflation due to rising cost of imports etc. I think it's more complicated than the simplistic picture you paint above. For me the things that need to change in the UK are to (i) reduce the cost of access to education and (ii) reduce the cost of housing.