There is quite a hierarchy among the people in charge of harvesting tea in Assam. This is true on the large plantations, anyway; there are also independent plots owned by small producers.
On the large plantations, the manager supervises the assistant managers, who organise the babus, whose role is to oversee the work of the sardars, who themselves are responsible for supervising the team of workers.
In this photo taken on the Dufflating plantation you can admire two sardars, who don’t look particularly approachable on first glance. But perhaps they are just reflecting, in their serious expressions, the position of authority they hold.