Which of the following is a reason for increased income inequality?

There is a decrease in the productive capacity of capital so that wages and salaries are instead paid to an improving labor force.

Taxes on earnings are collected each year, and the amount per worker is based on a progressive calculation.

Market wages are rising, and so the unemployed are incentivized to find a job.

People in a society do not begin with the same human capital, social capital, or bargaining power.

The structure of the labor union is reorganized such that their bargaining power is increased significantly.