In what way can public interest litigation help the poor?

Since 1979, the court has changed the trend for the poor in the situation or case, if
the case was filed by others on behalf of aggrieved persons.
 This case involved an important issue of public interest which involved the
betterment of life conditions of the poor.
 Even the voluntary organisations sought judicial intervention for protection of
existing rights of the poor.
 Public Interest Litigation (PIL) is a tool. For judicial activism which include protection
of environment, prohibition of trafficking especially of women, bonded labour,
grievances of weaker sections and relief for under trial prisoners in jail, etc.
 Example: Hussainara Khatoon vs. Bihar case, a petition was filed by an advocate in
favour of many prisoners in Bihar who spent long years in jail and released after the
Supreme Court heard the case.

 The problems of the poor are of different kinds which can be solved by the
intervention of Supreme Court after filing Public Interest Litigation (PIL).