1.to reduce the influence of mughals 2.to reduce the size of jagirs3.to appoint their own servants on high posts 4.to get strong hold on a large area

Introduction:
The nawabs of Awadh (Oudh) and Bengal attempted to eliminate the jagirdari system due to a variety of reasons. The jagirdari system was a revenue collection system in which jagirs (land grants) were given to nobles or zamindars in return for their services to the state. However, this system had several drawbacks and limitations that led to its abolition.

Political and Economic Reasons:
1. Consolidation of Power: The nawabs aimed to consolidate their authority and centralize the administration. The jagirdari system created a decentralized power structure, with jagirdars wielding considerable influence and autonomy within their territories. By doing away with this system, the nawabs could exert greater control and authority.

2. Revenue Collection: The jagirdari system often resulted in inefficiencies and revenue loss for the state. Jagirdars were responsible for collecting revenue from the land they controlled, but they often exploited their position by demanding excessive taxes, engaging in corruption, or neglecting their duties. This led to a decline in revenue for the state, which the nawabs sought to rectify by taking direct control over revenue collection.

3. Economic Reforms: The nawabs recognized the need for economic reforms to improve the overall financial condition of the state. By eliminating the jagirdari system, they aimed to introduce more efficient and standardized methods of revenue collection. This would ensure a fairer distribution of resources, incentivize productivity, and encourage economic growth.

Social and Administrative Reasons:
1. Inequitable Land Distribution: The jagirdari system resulted in the concentration of land ownership in the hands of a few elites, leading to social and economic inequalities. The nawabs sought to address this issue by redistributing land and breaking the power of the jagirdars, thereby promoting a more equitable society.

2. Administrative Efficiency: The jagirdari system often led to administrative complexities and inefficiencies. Jagirdars held considerable power and often had their own administrative apparatus, which sometimes clashed with the nawabs' authority. By eliminating this system, the nawabs aimed to streamline the administration and establish a more efficient governance structure.

3. Modernization and Western Influence: The nawabs of Awadh and Bengal were influenced by Western ideas and sought to modernize their states. They believed that the jagirdari system was outdated and incompatible with the changing times. By abolishing this system, they aimed to create a more progressive and modern society.

Conclusion:
The nawabs of Awadh and Bengal attempted to do away with the jagirdari system for a variety of reasons. Political and economic motivations, along with social and administrative concerns, played a significant role in their decision-making process. By eliminating this system, they aimed to consolidate their power, improve revenue collection, address social inequalities, streamline administration, and modernize their states.