https://en.wikipedia.org/wiki/File:Wealth_Inequality_in_Amer...
https://en.wikipedia.org/wiki/File:Wealth_Inequality_in_Amer...
EDIT: played with it a bit and produced this chart - Y axis has the base of the exponential (top 20% earns n-times more than bottom 20%). It seems that what US has is not exponential though - I can't get the bottom 40% to be as small without the top 20% becoming too big. I think that means that it's subexponential
http://i.imgur.com/gHxBXwa.png
EDIT 2: This is actually about wealth inequality rather than income inequality. So it makes sense for that to be much larger. Here is the paper it's based on
It's true in Sweden
Doctor: http://www.lonestatistik.se/loner.asp/yrke/Lakare-1234
Attorney: http://www.lonestatistik.se/loner.asp/yrke/Advokat-1066
Sanitation worker http://www.lonestatistik.se/loner.asp/yrke/Renhallningsarbet...
Recycling worker http://www.lonestatistik.se/loner.asp/yrke/Atervinningsarbet...
Probably related is that higher education is free (and you get a stipend and very cheap loans for living expenses) so doctors don't end up with hundreds of thousands in loans, and that doctors are in the public sector and not private.
"having rich parents" is a personal condition... you cannot choose condition, universe does not work like that - and every second we discuss income inequality is a wasted second. Thus we end up with hard work option
Non-sequitor.
Having rich parents can't be chosen: true.
Having rich parents (almost) be the only factor for success can be chosen, through economic policy.
There is absolutely no reason to ignore income inequality. Other than if you're one of the (extremely) few benefiting from it.
Also, your 7% number is wrong, from the graph it seems the poorest 80% has about 16%, which is less than the one predicted by 80/20, but not by much.
Again, I am not saying this is fair. The Pareto principle doesn't say this is healthy for a society, only that it is common.