Politicians are supposed to represent the interests of the people. Some do this as representatives in municipalities and cities, and others in the parliament or cabinet. Politicians, called ministers, are responsible for specific areas of interest. Thus, there is a foreign minister looking after foreign affairs, a home minister taking care of domestic matters, a minister for family welfare, and many others. Decisions have to be made on a lot of issues such as construction of schools, conducting sports events, or whether the pensions are to be raised.
What is a cabinet?