Public interest theory assumes public servants are motivated by desire to maximize society’s welfare. Public choice approach challenges this it views bureaucracy as in efficient and un-responsive. It believes that this is due to bureaucracy not being subjected to market forces. Bureaucrat is a budget maximizes and has an attitude different from private producer. Bureaucracy has rigid hierarchical structures, with expansion in functions,  the rigid structure leads to delay in delivery of goods and services. People do not have a choice and have to be satisfied with whatever provided. Government being centralized is unable to respond to diverse preferences of citizens.

Public Choice Theory

It is essentially a critique of bureaucratic model and wants to make public administration efficient and responsive and accordingly public choice approach advocates introduction of competition. It calls for institutional pluralism to improve the standards of service and to promote public choices.