An Englishman, Irishman and a Scotsman walk into a bar. The bartender looks up and greets them with a smile.
"What can I get you?" asks the bartender.
"Three pints of lager, please."
"Certainly, sir."
The bartender goes to pour the drinks and brief banter is had between the customers.
When it comes time to pay, no cash is produced. Instead the Englishman gets out his laptop.
"Do you take Bitcoins?" he asks.
"We do, in fact. Aren't they great?"
"Yes." answers the Englishman, as he transacts the Bitcoin funds, and drinks are had. Because neither customer nor retailer had to pay taxes, both benefited from the ability to spend their income exactly as they please.