Fareed Zakaria devotes his latest TIME magazine column to the facts surrounding the nation’s growing entitlement crisis.

The facts are hard to dispute. In 1900, 1 in 25 Americans was over the age of 65. In 2030, just 18 years from now, 1 in 5 Americans will be over 65. We will be a nation that looks like Florida. Because we have a large array of programs that provide guaranteed benefits to the elderly, this has huge budgetary implications. In 1960 there were about five working Americans for every retiree. By 2025, there will be just over two workers per retiree. In 1975 Social Security, Medicare and Medicaid made up 25% of federal spending. Today they add up to a whopping 40%. And within a decade, these programs will take up over half of all federal outlays.

Some argue that Peterson has been banging this drum for years–decades –and yet the grim reaper has not arrived. But we have postponed the problem by borrowing heavily for three decades, and there is a limit to how long we can keep increasing debt, which now stands at 100% of GDP. The budgetary strains are already apparent. Federal spending on everything other than entitlements and defense has been steadily shrinking for decades. Cities and states are in a downward spiral. A recent report from the National Governors Association points out that Medicaid is now the single largest item on state budgets and has grown by over 20% each of the past two years. As a result, spending on everything else is being slashed, from police and poverty programs to public education.

This trend will intensify. The Peter G. Peterson Foundation calculates–using Congressional Budget Office numbers–that by 2040 we are likely to spend 10% of GDP on interest payments alone (vs. 1.4% today). That’s four times what we spend on education, infrastructure and scientific research. Since entitlements and defense spending have powerful interest-group support, what will wither is everything else. The left must ask itself why it is tethered to a philosophy that insists that government’s overwhelming responsibility is for pensions and health care even when, as an inevitable consequence, this starves other vital functions of the state. Is insurance for the elderly the only important function of government? Above education? Above scientific innovation? Above investments in infrastructure and energy? Above poverty alleviation? And yet that is where we are headed.