90% of this number is related to Social Security and Medicare. Raise the age at which Social Security and Medicare can be received to 70 – and keep raising it as life expectancy increases – and this fiscal gap largely disappears. Easy to accomplish in theory, but politically difficult. Average life expectancy is 13 years greater than it was in 1935 when Social Security was enacted. And yet the age at which benefits can be received has stayed the same. The solution isn’t that complicated, but it requires political backbone, which is in short supply.