What an idiotic idea. There are a lot of messages about equality, and cooperation as opposed to competition. I'm not the first person to use this theory, but this is my own personal take on it. In many ways, Dragonball can be considered an examination of the world, with characters representing various peoples and nations. Starting with Dragonball, we get some pretty obvious examples, most notable of which is Oolong.
Oolong is a little humanoid pig with the ability to shapeshift.
When first discovered, he wears a chinese communist's uniform. In a way, he can be seen as one possible view of communist china. The early chaper of Dragonball Z can be seen as the battle against communism. Piccolo is West Germany. Krillin is Japan, a not as powerful as Goku, was at one time his enemy and rival, but is now his friend and ally.