There is a documented case from the early 90s where 12 people were arrested for distribution of cocaine. All received plea-bargains and served less than 2 years except for the least involved person, one of the dealer's wife.
She got a standard sentence of 15 years without possibility of parole for 7 years. The only reason she got the harshest sentence is that she didn't know anything and couldn't offer any information for a plea bargain like those directly involved were able to do.
Our system is broken, especially when it comes to the enforcement of drug laws. This lady will do a minimum of 7 years while child rapists do less than 2 and murderers get off in less than 20.