From indirect rule to direct colonial control

Why did British reliance on local rulers and chartered companies sometimes turn into direct colonial government?

Indirect rule lasted while the intermediary remained stable, but rebellion, corruption, or misgovernment could prompt Britain to assume direct control, as with the East India Company in India.

Britain often preferred to leave a reliable local ruler in place when that person could maintain order without constant intervention. The arrangement became unstable when successors rebelled, governed corruptly, or tried to play rival powers against one another. British officials then faced pressure to replace indirect influence with direct administration. The same logic applied to the British East India Company: Parliament tolerated company rule while it functioned, then intervened after the company had taken control of India and governed it badly. Direct colonial rule appears here as an escalation from failed intermediaries rather than evidence that the state began every venture with a complete plan for annexation.