Essentially U.S. helps impoverished nations with infrastructure and other aid, but saddles them with debt in order to control them politically or otherwise.
The interesting part was when it came to Saudi Arabia, which had so much money it didn't need to take on debt to develop their infrastructure. So instead they bought America's debt as this article explains.
I lived in the kingdom from '82 - '04 which was quite an interesting time span to have lived there. Things have definitely changed as a younger, mostly western educated generation, returns home and social unrest cannot be quelled with unlimited social programs anymore.
Most of the Saudi's I know now simply take american concepts/franchises and spin them out over there. From hamburger chains to house cleaning services. Works pretty well for them.
The most annoying thing was the weekends were on Thursday and Friday, so if you wanted to do anything international with a bank you could only do it Mon - Wed as their banks were closed on their weekends and then U.S. banks were closed Sat / Sun.
I believe you can still simply walk to a certain part of town and watch an execution, along with a couple of hands once a week there. Just you know, if you wanted something to do on a weekend.