The average tax contribution by the richest 30 percent of income earners in the 14 countries on this list is 62.47 percent. Tax contributed by the poorest 30 percent of income earners is about 7.17 percent. So the rich contribute approximately 8 times as much tax revenue as the poor.
The richest 20 percent in these countries earn an average of 39 percent of the income. The poorest 20 percent earn about 7.85 percent of the income, or about one-fifth as much.
The biggest income disparity is in the United States, where the top 20 percent earn 46.5 percent of the income, while the poorest 20 percent earn 5.2 percent, about 11 percent as much.
In Denmark, the poorest 20 percent earned 9.6 percent of the income, almost 28 percent of the share earned by the richest 20 percent (34.5 percent).