Important Qustion: Corrpution in Tax department ???

Today two sales tax officer arrested by anticorpution deptt. in Noida. But my question is why income tax,sales tax and service tax deptt. employee are more corrputed ??? Are you justified it??? Why we paid bribe??? Pls suggest your view on that serious metter ??? Can you have any suggestion to avoid paying bribe but our work not disturb by it.