In October 2017, a family of four immolated themselves after they were harassed over unpaid debts by a moneylender. Esakkimuthu, the leader of the family took this extreme decision, since the district collector had not solved his problem, despite repeated petitions.
In the teaser of the film Sarkar, that has actor Vijay in the lead role, there is a scene where an immolation happens, and Vijay stand there with eyes filled with tears. There are possibilities that this scene could be a reference to the above mentioned drastic event.
Vijay and Murugadoss had collaborated twice before, and in both the films, events of political and social importance were referenced. For example, the film Kaththi had Vijay speaking dialogues about 2G scam, and farmers suicide. We can expect a lot of scenes like that, since this film has a lot of politics involved.