Answer:
Low skilled labour immigration ; Increase in Information technology ; Decreased Trade Unions, Increase in Informal Employment Sector
Explanation:
Income Inequality depicts the degree of un-even-ness, with which per capita income is distributed among population.
US has high level of income inequality ('top 20 percent wealthiest people in the United States control 85 percent of all the wealth in the country').
Most likely reasons for this income inequalities :