Question

why did East India Company incur financial burden during wellesley's regime​

Answer 1

There were many Policy, Britishers have followed to spoil the Indian, in which Subsidiary alliance by Lord Wellesley was one of them.

Doctrine of Lapse was also one of the policy by which City of Jhansi was seized.

Correct Reason ⇒ We know, In the year 1764, Britishers have fought the Battle of Buxur, thus there were very financial unstability, so to avoid them and make them fulfill they started a policy by the name of subsidiary alliance which was issued by the Lord Wellesley in 1798.

By the Subsidiary alliance,  Hyderabad, Gwalior, (near Jhansi) , Jaipur, Jodhpur, etc was seized.

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