What are some reasons for the differences in the distribution of income in Australia and Brazil and

Question:

What are some reasons for the differences in the of income in Australia and Brazil and South Africa?
Households Market income
(percentage) (percent of total)
Lowest 20……………………....7
Second 20……………………..13
Middle 20……………………..18
Next highest 20……………….24
Highest 20…………………….38
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...