An Oligarchy is an government lead by a group of wealthy and powerful people. That are usually selfish, and greedy. In a oligarchy the people are usually working long hours, and are not happy with their life. So many people try to escape to nearby countries to have a better life.
How laws are made
Laws are still passed as normal but the laws have to be made the way the Oligarchy want it to be made. In an Oligarchy the laws are usually strict and very demanding. The law are usually what the Oligarchy want, or what is useful for them.