First, we have to talk about the problem faced by Maratha -
1-
The Chhatrapati Shahu -
- he a saint person, who stopped Peshwa from fortification of Maratha ruled land.
-he saves Nizam from Peshwa in 1727
https://en.wikipedia.org/wiki/Battle_of_Palkhed, the continued co-rule of Maratha and Nizam give the false sense of security to Peshwa in the latter era and suddenly Nizam was in the enemy camp.
-He died childlessly, the chieftain of Maratha almost all of them were rise in their position in Shahu era never have any inbuilt loyalty to Bhonsle linage only for Shahu or Peshwa, on the otherwise Peshwa had a clear line of succession for three-generation, they command army and purse of the empire.
2-
Money-
- Maratha second problem arises from the revenue side, they always were in debt of Brahmin banker of Maharashtra.
- when the sap in the revenue closes around 1758, Peshwa went into the crisis after the third battle of Panipat.
3-
Leadership -
it comes in the last era of the Maratha empire.
4-
Mughal noble -
-an ecosystem of Afghan, Turk and Persian nobility built over centuries. It had taken over five hundred years for invaders to totally dominate India’s cow belt region and to reverse the process would take time. The Mughal Empire’s decay had increased the political power of second in command Nawabs, Nizams and landlords, nearly all of them Muslims. Except for the Rajputs, Surajmal and the Bundelas, hardly any Hindu ruler had reaped the harvest of a falling Mughal empire. The administration remained firmly in Afghan or Turkic hands, albeit without the unifying factor of the Mughal.
-Till the latter part of Aurangzeb’s rule, more than seventy per cent of Mughal nobility was Muslim and of these, two-thirds were of foreign origin(North India)!
- this foreign nature of Nobility in Delhi made the always threaten the western border of India, they can ask from Afghan or Persian power to come and help the Mughal emperor.
-it's not about the legitimacy of Mughal rule, it was danger of army from Western border stop Maratha to depose emperor.
- if they defeated Afghan in 1761, they will be independent for 20-30 years from any another invasion from the western border, they will have time to ramp up the bureaucracy in North India.
Note-Please read The New Cambridge History of India-Gordon, Stewart (1993). The Marathas 1600-1818. p. 211. , it is a must-read book for knowing about Maratha and their rule.