The goal of policy should be to maximize world income (output) and its distribution that reflects the contribution of each player. That occurs when resources (capital and labor) are allocate to their most productive uses. But how is that achieved? First by ensuring that the government does not interfere. If the government subsidizes an activity, it will draw resources from its most productive use to the subsidized one thus reducing income.
The government’s role is important for defining and protecting property rights and the rule of law and the basic infrastructure on which firms operate. For example, in the U.S. the government funded basic research because there is no market incentive to undertake it. Much of it provides knowledge that is never used or exploited, but some is exploited by private firms for purposes the government could not guess in advance.
In the real world, consumers’ tastes change and the products and services being offered evolve and the optimal allocation of resources (capital and labor) must evolve as well. Those that are not the most productive tend to go out of business, freeing those resources for better uses. When governments intervene via subsidies or differential taxes they invariably reduce the efficiency of resource allocation and thus lower incomes. Bilateral trade deals introduce large distortions in resource allocation and thus lower global income.
The global maximum thus requires common rules for fair trade globally. The World Trade Organization is the institution through which such rules are developed and enforced (or at lease it should be). Bilateral deals undermine the level playing field optimal resource allocation requires and thus lower world income. With the weakening of the WTO and other international rules and norms, the world is increasingly falling below the income it is capable of.
Warren's space 