Yes, local governments put too much pressure on officers to issue parking tickets, because the officers bring in a lot of money for the local governments by writing the tickets. The government essentially expects the officer to pay for his or her own employment by issuing the tickets. This is a lot of pressure on the officer and inconsistent with fair law enforcement.
I believe that there is too much pressure placed on traffic officers in order to issue tickets as a way of creating revenue for the local government. The pressure leads to them actively seeking out infringements, and to tickets being issued for trivial matters that would normally not warrant enforcement actions.