On Monday, I penned a post arguing that Sen. Orrin Hatch (R-UT) was wrong when he commented that we have a spending problem and more revenue is not part of the solution. I used Congressional Budget Office (CBO) data from its 2012 Long Term Budget Outlook to make my point, but that data is a bit out of date. Luckily, the CBO released its 2013 Long Term Budget Outlook two days ago and guess what it showed? Our deficit is magically disappearing!

That’s thanks to the Fiscal Cliff deal that raised taxes on the highest earners, which increased projected revenues. As for spending, health care costs are growing at a much slower rate than expected, not only due to the recession, but also because we seem to have bent the cost curve permanently. That’s a huge improvement. In addition, the sequester is looking more and more like permanent policy. Thus, overall spending has dropped significantly compared to last year.

Nevertheless, entitlement spending is still projected to rise from 9.6% of GDP in 2013 to 14.3% of GDP in 2038. That’s still a large gap. The only reason the budget deficit doesn’t rise a similar amount is because the CBO projects other spending – the stuff the sequester mostly cuts – to fall from 10% of GDP to 7.1%. The increase in entitlement spending (4.7 percentage points) in the 2013 report is less than in last year’s (6.2 percentage points), but it’s still substantial. So, what’s driving that increase? The CBO breaks it down:

1. 54% Aging: This is an unavoidable aspect of our future budget. Baby boomers are retiring and will start collecting Social Security and Medicare. There’s nothing we can do about that. As America gets older, our retirement programs are going to cost more. Not surprisingly, that’s what the CBO found to be the largest driver of entitlement spending growth. Of that 4.7% increase, 2.5 percentage points is due to aging. It’s not out of control spending on entitlements. It’s just Americans getting older. We can’t pretend that’s not the case.
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2. 28% Excess Cost Growth: Excess cost growth is the increase in health care spending beyond the rate of inflation. It’s an area we have made significant progress on in recent years, but we can still do better. However, this doesn’t require cutting benefits or changing the eligibility requirements for different programs. It requires bending the health care cost curve even more so that health care is provided more efficiently. Obamacare includes a number of different experiments to try to find ways to do just that.
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3. 19% Medicaid Expansion and Exchange Subsidies: This is the area that conservatives are dying to cut. but of the main drivers of long-term entitlement spending, the Medicaid expansion and exchange subsidies account for less than one-fifth of it. In addition, excess cost growth is increases spending due to rising costs of programs. It doesn’t mean that seniors receive more benefits or that more people are eligible for the programs. It just means health care is getting more expensive. The Medicaid expansion and exchange subsidies do more than that though. They bring healthcare to millions of people. Eliminating them may have a positive impact on the long-term budget, but it has serious side effects as well.

Unlike my post on Monday, my main point here is not that we need more revenue. The main point is that we have solved a large part of our budget deficit and of the part we haven’t solved, most of it is due to demographic changes and millions of more people getting health care. Republicans can yell about how entitlement spending is running out of control, but the fact of the matter is that it isn’t. It’s on an unsustainable path, but one that is caused mainly by an aging population. Policymakers shouldn’t forget that.