Crab Mentality

Majority knows that Crab Mentality is a way of thinking and dealing with a problem or situation by pulling other people down just to get on top. I wonder, do crabs really pull each other down upon climbing the basket from where they were all being held? Or do these fellas create a ladder of crabs so that they will all meet their common objective, to be free. I personally observe it and after awhile, not a single crab was left on the basket. That kind of mentality is projected by people alone. The capacity to back-stab and sacrifice one's colleague for his or her own personal agenda. So spare the crabs and lets call it "Scheming person's mentality". Here is a good example, a good political example, thank you Sir Cito Beltran for the enlightenment. http://www.philstar.com/Article.aspx?articleId=542790&publicationSubCategoryId=64