Figure 7.7 on page 236 shows that the Congressional Budget Office forecasts that only about 10 percent of future increases in spending on Medicare as a percentage of GDP will be due to the aging of the population. What factors explain the other 90 percent of the increase?

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Federal spending as a percentage of GDP 20% Effect of excess cost growth 15 10 Effect of aging population 2024 2014 2034 2044 2054 2064 2074 2084