A cartel by definition is an association of manufacturers or suppliers with the purpose of maintaining prices at a high level and restricting competition. The American mafia were more extortionists than a cartel. For example, Big Paul and Chin forced builders to buy their concrete in the 80s but only because they would face union action if they didn't. That's not necessarily control of supply. Same with waste management. Supply was never the issue for anyone trying to break into that industry. Threats, arson, and things like that kept them out.

"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea