However those are exactly the sort of people that a well run criminal organization would keep at a distance. The opportunities one gets from dodgy people are dodgy opportunities.

The recruiting of violent, power seeking, poor impulse control people was one of the major factors in the decline of the five families. When better opportunities existed for 2nd and 3rd generation Italian-Americans, many took those better non-criminal opportunities. An organized crime life is a pretty hard life. This dramatically hurt the number of good candidates that organized crime could recruit from. The candidates they did recruit often placed their individual desires over the needs of the organization. This destroyed the internal trust which was a major enabler of their success.