Impact of Income Inequality on Wellbeing with Constant Average Income
Average income can be a misleading indicator of a group's welfare when income is distributed unequally. Consider a scenario where an increase in inequality leaves the average income unchanged. For example, if half of a population's income rises to $9,000 per month while the other half's falls to $1,000, the average remains $5,000. Despite the constant average, the group's overall wellbeing would likely decrease. This is because the additional income for the wealthier half is less impactful on their wellbeing compared to the significant negative effect of the income loss on the poorer half. Essentially, the hardship of the poor outweighs the benefit to the rich, leading to a net decline in the group's welfare. This principle can be extended to an extreme case where a country's entire economic output is held by just one person, while the rest have nothing. Even with an unchanged GDP per capita, it is clear the group is not well-off, demonstrating that the distribution of the economic 'pie' is vital for actual living standards, a factor that average measures like GDP per capita often overlook.
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