If you look at Montreal, where the mafia presence is quite large, street gangs are often used on hits and and the Mafia's close connections to biker gangs make them a strong force. LeClerc institute ( a medium security prison in Laval Quebec) was once notorious for its Biker/Mafiosi element which essentially ran the prison.
Raynald Desjardins, who has been in the news recently, famously hired a construction crew to refurbish the track and field on the prison grounds. While he was an inmate.