What the figure is telling us is that, presuming CBO’s ACA projections hold, Medicare spending will slow considerably between now and 2035, consuming only 5.5% of GDP in that year rather than 7.2% under pre-ACA law. Volsky goes on to point out that, as good as this is–if it comes to fruition–it’s not good enough. That point is made clear with a chart created by another blogger dedicated to evidence-based health policy and based on CBO’s data. I’ve posted that chart so many times I just can’t bear to see it again. So, check Volsky’s post.