tax. The Swiss tax would have a very small effect on income inequality, lowering the post-tax Gini coefficient by 0 ….004 Gini points. The effect of the Swiss tax and Warren tax on wealth inequality is miniscule, lowering the Gini coefficient by … tax rates running from 0.05 to 0.3 percent on $2,400,000 or more of wealth. It also considers a wealth tax proposed by …