Reallocation of resources: In case, the market economy fails or does not attain the desired social objectives, the government has to interfere via budget and reallocate resources accordingly.
Through its budgetary policy, the government of a country directs the allotment of resources in such a manner that there is a balance among the goals of profit maximization and social welfare. The production of goods that are injurious to health is discouraged via heavy taxation. On other hand, production of socially helpful goods is encouraged via subsidies.