President Trump’s budget yesterday provides the latest evidence of out-of-control entitlement spending. In the baseline projections, Social Security spending will grow 5.9 percent in 2020 and Medicare spending will grow 8.8 percent. Social Security will grow at a 5.8 percent compound annual rate over the coming decade, while Medicare will grow at 7.8 percent. By contrast, inflation is expected to average 2.3 percent annually over the coming decade.

Social Security and Medicare are the first- and third-largest programs in the federal budget, and they are pushing the government toward a fiscal crisis. Medicare spending this year, net of premiums, is $645 billion, while the second-largest program, defense, is $674 billion. But Medicare spending will surpass defense in the next year or two, and by 2029 Medicare at $1.36 trillion will dwarf defense at $787 billion, at least in the baseline projection.

Social Security and Medicare are not the only programs for the elderly in the federal budget. A chart from CBO’s latest update shows the share of overall noninterest federal spending going to the old. The share is expected to rise from 40 percent in 2018 to 50 percent by 2029. Spending on the elderly will create sustained pressure on federal finances and taxpayer wallets in the years ahead.