I think we must defeat the Taliban and their allies to the point where their activities can be handled as local criminal matters by the Afghan government. Political support and economic development can only take place after we establish a safe environment for them, and that mean, imo, securing areas to the point where local law enforcement can take over.
Afghanistan already has an economy. The question is how can we help Afghanistan to develop a more modern economy and to extend the benefits of it to the rural areas as well as to the cities. Imo, four steps are necessary. First, a safe environment must be established to encourage investment and economic development. Second, stable and honest political institutions must be established to encourage investment and to win the confidence of the people. Three, a bottom up approach to economic development must be applied to help farmers and local industries to become more productive by adopting modern methods; this will make some local economies more prosperous and help win confidence in the government. Fourth, continuing investment in physical infrastructure, transportation and communications, and social infrastructure, education to improve human capital and at least minimal social services to ease the transition to a more modern national economy, so that foreign investment can be attracted to help grow the economy.
Given the right conditions, in a few years when you call for tech support, you might well end up talking with some one in Afghanistan. Companies that offer services to oil producers might well want to set up headquarters in Afghanistan from which to service clients in various countries in the neighborhood. International banking institutions might want to do the same to facilitate transactions in the area and to more closely service client needs in the area. If Indian companies can offer IT services on a global basis, why can't future Afghan companies do the same? Once security and confidence in political institutions are established, there is no reason to doubt that continued investment in physical and social infrastructure will bring economic development and growth.