Here's a way to think about it.
"John Paulson, a hedge fund manager in New York City, made
$4.9 billion last year, top of the chart for hedge fund managers, according to AR Magazine, which follows hedge funds. That’s equivalent to the
average per capita income of 184,000 Americans, according to my back-of-envelope calculations based on Census Bureau figures."
http://www.nytimes.com/2011/07/07/opinion/07kristof.html
So you could look at it relatively like this.
You make the equivalent of 184,000 of your country's people's average income combined you are rich. (~5 billion in USA)
You make the equivalent of 92,000 of your country's people's average income combined you are rich. (~2.5 billion in USA)
You make the equivalent of 46,000 of your country's people's average income combined you are rich. (~1.25 billion in USA)
You make the equivalent of 40,000 of your country's people's average income combined you are rich. (~1 billion in USA)
You make the equivalent of 23,000 of your country's people's average income combined you are rich. (~500 million in USA)
You make the equivalent of 12,000 of your country's people's average income combined you are rich. (~250 million in USA)
You make the equivalent of 5000 of your country's people's average income combined you are rich. (~100 million in USA)
You make the equivalent of 2500 of your country's people's average income combined you are rich. (~50 million in USA)
You make the equivalent of 250 of your country's people's average income combined you are rich. (~5 million in USA)
You make the equivalent of 50 of your country's people's average income combined you are rich. (~1 million in USA)
So I'm thinking 1/50 is rich.
But as I look at this it seems I feel this way because I'm thinking of how much on average it takes to live in the middle class in USA per year, and then seeing how much above this one is making.
Therefore, if on average it takes 100,000 for a couple with 2 kids to live comfortable, or middle class living, then
If you make 10 times this middle class number you are rich (1 million in USA)