So studies of wage, salary and labor income count this large source of income concentrated among the top income earners in the later years, but not in the earlier years, showing a large increase in inequality and in the incomes of the top earners over the years.

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Of course a number of factors can contribute to low employee engagement, including salary, benefits, workload, etc.. But a closer look at other studies of employee happiness and engagement reflects a number of other factors that go beyond benefits.

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