Because when things are made too easy for the cops, you tend to get influence peddling and corruption about the small things, and it will then grow until you approach a police state.
Case in point, wherein fixing parking and traffic tickets for family, friends, and politicos leads to bigger crimes and bigger coveruyps:
A three-year investigation into the police’s habit of fixing traffic and parking tickets in the Bronx ended in the unsealing of indictments on Friday and a stunning display of vitriol by hundreds of off-duty officers, who converged on the courthouse to applaud their accused colleagues and denounce their prosecution.
As 16 police officers were arraigned at State Supreme Court in the Bronx, incensed colleagues organized by their union cursed and taunted prosecutors and investigators, chanting “Down with the D.A.” and “Ray Kelly, hypocrite.”
As the defendants emerged from their morning court appearance, a swarm of officers formed a cordon in the hallway and clapped as they picked their way to the elevators. Members of the news media were prevented by court officers from walking down the hallway where more than 100 off-duty police officers had gathered outside the courtroom.
The assembled police officers blocked cameras from filming their colleagues, in one instance grabbing lenses and shoving television camera operators backward.
The unsealed indictments contained more than 1,600 criminal counts, the bulk of them misdemeanors having to do with making tickets disappear as favors for friends, relatives and others with clout. But they also outlined more serious crimes, related both to ticket-fixing and drugs, grand larceny and unrelated corruption. Four of the officers were charged with helping a man get away with assault.
Jose R. Ramos, an officer in the 40th Precinct whose suspicious behavior spawned the protracted investigation, was accused of two dozen crimes, including attempted robbery, attempted grand larceny, transporting what he thought was heroin for drug dealers and revealing the identity of a confidential informant.
The case, troubling to many New Yorkers because of its implication that the police officers believed they deserved special treatment, is expected to have long tentacles. Scores of other officers accused of fixing tickets could face departmental charges. Some officers have already retired. Moreover, the indictments may jeopardize thousands of cases in which implicated officers are important witnesses and may be seen as untrustworthy by Bronx juries.
(emphasis mine)
This is what happens when law enforcement officials feel entitled.
You will always have a few bad eggs in any endeavor, but when the entire culture is one of entitlement, corruption, and law breaking, you end up with a toxic mix that can eats at the core of society.