If drugs were legal, their prices would plummet and so would the crime done to buy them.
Ever see a chronic doper work for a living?
"Plummet" does not mean "go to zero." With lower prices, dopers who commit crimes for drug money would need to commit fewer - QED.
Give me the number. I know people who partake from all walks of life, all of them employed and contributing members of society. In fact, I know several who could probably buy and sell you and just about everyone who posts here several times over.
Generalizations aren't your friends, friend.