Sometimes police create a crime in which there never was one to begin with. Disorderly conduct, resisting arresting, peace disturbances may never even happen to otherwise lawful abiding citizens until police interject their presence and authority into those people's personal business. There are also incidences of police intentionally or unintentionally misunderstanding a situation or even fabricating one to suit some other agenda. As far as more police making more contacts with people, stopping, searching, questioning and investigating people, its more than likely going to intially show a rise in the statistical numbers of crimes being reported as well.
I agree that our government is responsible in a big time way of manufacturing crime. The more things we outlaw, the more potential we have made for crimes to be commited. Victimless crimes are a great example of this. We could cut down massively on the amount of crime just by redefining what crime actually is. Why should a person who wants to sell sex with their body for a monetary price be subject to arrest, confinement, prosecution and then further punishment? Same thing for those who wish to partake in recreationally using drugs that are currently illegal. Same thing for certain restrictions on possessing and carrying weapons. For example, I know two people close to me who are very friendly and very good citizens who illegally carry concealed without permits for their own protection. Under our current state laws, they are commiting crimes.
I also strongly believe that the last thing organized law enforement wants to see is a reduction in crime. Less crime means less dependance upon them, less need for their numbers which also brings less intrusion and ultimately less power. On the individual level, I believe many officers would prefer to see less crime but as an institution, most definitely not. If so, you wouldn't see them standing in the way almost everytime there is talk or legislation aimed at legalizing certain things such as marijuana use, carrying firearms and prostitution. They also tend to resist changes that would result in further protecting citizens from the authority they wield over us as well. They want more leeway in pulling us over, demanding us to identify ourselves, gaining access into our pockets, our gloveboxes and our homes.