Putting petrol and groceries on the credit card is getting boring now. How many maxed out credit cards does one family need?
Rich folk keep saying "Why? Why? Why?" and we say "Why not?"
As is (sadly) customary with major elections and campaign promises, I think you'll feel cheated again. There certainly are (were) good arguments to be made for leaving (the inability of the EU to fundamentally change its structure, the EP giving all of Europe the big finger when it happily elected Juncker as president instead of a reformist, the ideal of self-determination); but economics isn't one of those.
"I'm fed up with being poor. I'm going to show those big-wigs that we've had enough! By voting to... leave the EU. Yeah. I'm like, 15% sure it has something to do with the EU."