Pretty funny that "Street Performer / Homeless" is expected to pay more than "Student / Teacher" (probably accurate, too).
Depends where you live. You can make hundreds of $ a day as a street performer if you're good, and you have a good spot (preferably one with some tourists who havent managed to quite work out the exchange rate yet.)
Bonus points for being student at the same time.
Their net worth is probably higher as well. No student loans or mortgages for example.
I would like to see an A/B test with and without that chart to see what the difference in donation rates is.
I think the chart probably helps, but always better to gather data right?
I hope for the sake of their wallets that people working at startups don't take this chart too seriously. Based on the job postings I've seen in the past 6 months an awful lot of people would be paying the "rock star" rates!
I think comparing with other products (coffee at Starbucks, burger at McDonalds etc.) might be more effective.
+1 for the reference to Edward Tufte/Charles Minard Napoleon map.