Truth is that everybody in the US (and Europe) is wealthy. The panhandler on the corner is making more money than the median daily income of the world population.
Until people admit "I am wealthy, and I need to help out" instead of pointing to whoever has more wealth than they do, nothing will change.
> It is clear from the graph that when put in the context of their individual budgets, donor households towards the lower end of the expenditure distribution tend to give away more of their money to charity than donor households in the higher expenditure percentiles. On this measure, poorer donor households are more generous than richer donor households, those in the bottom decile donating approximately 3% of their budget compared with those in the top decile donating roughly 1%.
http://www.cgap.org.uk/uploads/Briefing%20Papers/CGAP%20BN7%...
In other words, loss aversion is a strong incentive.
People would rather over-pay to receive something than pay for a general tax (a loss) even when it would provide an absolute equivalent result.
Speaking of which, you'd first have to ban all election spending. Campaigning would be done by marching in the street with a bristol board sign colored with crayons, taped to a softwood plank.