Which of the following are examples of automatic stabilizers? check all that apply. in 1968, congress enacted a temporary 10% increase in personal income tax rates in response to an inflationary gdp gap. in response to the 2008 recession, congress approved billions of dollars of additional spending on public infrastructure projects. as people earn higher incomes during an expansion, the progressive tax system requires them to pay higher average tax rates. as unemployment falls during an expansion, unemployment insurance payments decline.