How much is enough for living expenses

In the Sunday Times articles discuss about, how much is enough for living expense:

In the article, the discussion on how much is enough for a person expense, which drew numerous comments.

http://mrwangsaysso.blogspot.com/

In the forum of how much is enough is subjective. I knew a Malay guy. With the pay of $1200 per month, had 3 children and a wife to feed.

My brother in law with little educations, one person feed six mouths, my sister and his four children. Now all his children are grown-up and had good educations. He work 2 jobs a day time security job and part time taxi driver.

Mike Tyson made US$300 millions in his lifetimes. Still he became bankrupt and in debts.
Celebrities that went bankrupt:http://www.legalzoom.com/articles/article

In a Sunday Time article, a person should not overspend what he earn.

In Singapore you can hardly find a person starve to dead.

Stories on frugality:http://aol.fool.com/personal-finance/saving

Some made great fortune in their lifetime but at the end of their life end a pauper.

So the questions is to be successful is not much of how much we can earn, is how much we can save from what we earn.