There is a certain tautology to "tax the rich" - a country can't exactly tax the poor. The poor have no money. Taxes on poor people are more about the principles of fairness and to some extent transparency than because they have the financial resources to contribute meaningfully.
It'd be interesting to do the same graph by real consumption. I bet it'd be much more equal - most of the wealth is tied up in systems that keep the country ticking over and are only providing paper benefits to the owner. Which is why I say "transparency" - once you track what happens in real terms, "taxing the rich" almost certainly becomes "everyone ends up with less". If you take real resources away from the person who owns the McDonald's ice cream machine in real terms I have a hard time seeing how it won't come out of the lifestyle of the dude buying icecream. The person getting the money wasn't consuming anything real.
It'd be interesting to do the same graph by real consumption. I bet it'd be much more equal - most of the wealth is tied up in systems that keep the country ticking over and are only providing paper benefits to the owner. Which is why I say "transparency" - once you track what happens in real terms, "taxing the rich" almost certainly becomes "everyone ends up with less". If you take real resources away from the person who owns the McDonald's ice cream machine in real terms I have a hard time seeing how it won't come out of the lifestyle of the dude buying icecream. The person getting the money wasn't consuming anything real.