Someone in UK is so good that went how they calculate the prostitution and illegal drugs activities for the UK
Prostitution
60,879 prostitute per 25 clients per week per 67.17 pounds per visit
Drugs 2.2 million users worth 1.2 billion pounds, half of it produced at home (using gas and electricty and water) for an estimated 154 million pounds.
Admittely they do not pay tax, but contribute to the economy paying water, electricty, new cars, phone etc.
The early data suggest a GDP contribution of 0.7%
As Berlusconi would say….let’s all Bunga Bunga Party to richness!