Sociologist will tell you in term of human, there is only two
types (class), in french german, a sociologist who identified them
call them Bourgosis and Proletrian, in hokkien, I call it wu chuah
li and bo chuah li, meaning got money and no money people.
This struggling between the wu chuah li and bo chuah li will go
on and on, some of them switched camp become rich, some from rich
to rag, but it is this struggling that moved the world.
The rich will alway want more poor, the more the poor anyhow
spent the more rich they become, and therefore, they like to entice
the poor with new things to buy, news stuff to acquire, and new
opportunity to venture, and the poor, being the larger pool, alway
think that the rich who paid them, helped them, but what the rich
did was, to exploit the poor at all cost, if not they cannot become
rich.
Chim....Chim.....chim-a-logi.. 
