The difference is that when serving they: hold hearings, and develop as well as vote on legislation, all bills must also go through the congress before being passed, while representing they attend to the needs of the constituents of the federal government so they give special attention to request from people of higher interest
The economy does best when government does not get involved and it’s advocates appealed to social Darwinism to illustrate that it is only natural for the best businesses and business leaders to survive and excel while others fail.