Nope. If you're powerful they may want to curry your favor but they'd much rather have dirt on you to manipulate you with. You're kidding yourself if you think the rich and powerful don't simply tell the police to talk to their lawyers.
People in power would not tolerate a police trying to manipulate them. By definition, people in power would have the power to change that.
Power is what decides what police does, who they target and who they leave alone. It controls the budget, appoints the leaders and sets the directions.
Power, in 1950s England, came to people from Eton and King's college. They didn't need to fear the police because they (and their family) controlled it.