Why did the Nawabs of Awadh and Bengal try to do away with the jagirdari system?

The Nawabs of Awadh and Bengal tried to do away with the jagirdari system because:

1. They wanted to put a curb on cheating as well as the Mughal influence in their kingdoms.

2. Under the jagirdari system, revenue was collected by the jagidars appointed by the Mughal emperor, so by abolishing emperor-appointed jagirdars they wanted to take the revenue (finance) department under their control.

3. They have rights of dismissal of the jagirdars and selling the right to collect revenue to revenue farmers, it helps them to acquire control over the resources of the province. Hence, they tried to do way with the jagirdari system.