Manager can't save you from yourself. Jerry Heller couldn't make ice cube go on tour or make Dre not fukk his girl while he was gone. Jerry Heller worked for Eazy, not NWA so the only person he was responsible for was Eazy and when things got tough for Eazy, Jerry did what he had to do to keep the lights on at ruthless. He moved money to pay bills and expenses not line his own pocket. He didn't tell Eazy what he was doing and that's where the "stealing money" myth came from.
Cube lied about a lot. You know who told Ice Cube the 75k wasn't enough money? His parents. The same parents who told him that he had to walk away from the hottest music group on earth to go to school and get a degree and hope he gets a job making 75k. The same parents who know nothing of how the music business works. Those were his advisors. Jerry Heller gave him the same contract the everyone else in the group got. He tried to go over Jerry's head to Bryan Turner and Turner realized cube wasn't in a contract and sold him a dream to walk away from Ruthless and sign directly to priority.
Cube was the only person to have a money dispute in NWA and he was also the only one not to go on tours. Outside of bone thugs bad math skills, no one else on ruthless had a money issue or complaints about Jerry Heller shortchanging them. Funny thing is just about everyone that signed to ice cube has had money issues and complaints about him shortchanging them. If Jerry Heller was such a terrible person and thief then why did Dre do business with him after he left death row?