All the legwork is done through private contractors. Although the work is being carried out on behalf of The National Security Agency, nowhere are US government employees seen.
Subcontractor economists -- economic hit men -- hired by other branches of our government (e.g., State Department) enter a country and produce a development model based on a loan from the World Bank. The model produced by these economists deliberately overestimates -- by typically double -- the amount of economic development which can result from a loan. This means that if a country takes the loan and spends the money, they can't possibly ever pay it back. This places these countries in debt bondage forever; banks force the county to sell its common resources, cut government spending, and dismantle its social welfare system.
If the leader of a country is reluctant to take a loan, which is actually double the size they could actually use, the subcontractor tries to bribe the leader by deliberately overpaying for local good and services, sending his or her relatives to US universities, giving his or her relatives lucrative jobs, etc.
If the leader of a country is honest and can't be bribed, we send in the "Jackals." These are subcontractors who intimidate leaders and, if necessary, assassinate them. The assassination is supposed to bring a new leader that is more dishonest and bribable.
Keep in mind the goal of all of this is to force countries around the world to sell all of their common resources (oil, state-owned industries, welfare system etc.) and force the work to be done by US industries.
If the leader of a country can't be bribed or assassinated (e.g., Saddam Hussein), the only option left is boots on the ground war -- to send our troops into the country and forcibly remove a recalcitrant leader.
Can you see us using this process of empire building in today's headlines?