The first budget proposed by the Trump White House doesn’t cut old-age payments to grandma and grandpa, but it does technically violate the president’s 2016 campaign pledge not to touch Social Security.

How? The budget aims to curtail massive U.S. deficits in part by cutting payments to disabled workers by $72 billion over the next 10 years. The disability insurance fund was created in 1956 in a series of amendments to beef up Social Security.

White House budget director Mitch Mulvaney has argued most Americans don’t view disability insurance as part of the popular old-age pension program.

“It’s not what most people consider to be Social Security,” Mulvaney said Tuesday as the administration rolled out its budget.

The disability program has attracted more scrutiny in the wake of the Great Recession as the number of beneficiaries and the amount the federal government shells out soared.

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The Obama administration even stepped up efforts to tighten eligibility requirements and keep disabled workers in the labor force amid growing worries that the disability insurance fund was being depleted too quickly.

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U.S. spending on disability benefits, for example, leaped by 160% to $142.7 billion in 2016 compared to the $54.9 billion in 2000.

The government paid benefits to 10.6 million people in 2016 vs. 8.9 million in 2007 and 6.7 million in 2000. The number of checks sent out are up 19% from a decade ago and 58% compared to the end of the Clinton administration.

Part of the increase reflects the aging of baby boomers, but looser eligibility rules and the Great Recession also contributed. Opponents of the program’s expansion assert that too many people have taken advantage of a system designed for the truly disabled.

Efforts by the Obama White House to reverse the trend bore some fruit in its final two years, aided by an economic rebound.

The number of beneficiaries, for example, has fallen from a peak of 10.99 million in 2013. And spending dipped last year to $142.7 billion from a record $143.3 billion in 2015.

The Trump White House would try to build on those initiatives, but it would also further tighten eligibility review and cut retroactive benefits that critics say go too deep.

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These changes would supposedly save $72 billion from 2018 to 2027, or about $7.2 billion a year.

That represents 5% of the disability benefits the government doled out in 2016.