They say it’s will be 106% of the GDP by 2035. Actually it already exceeds the GDP. When they give their number they are looking only at the public debt and excluding the social security ious for instance. That only makes sense if you assume that the government is not going to repay the social security ious.
The government is NOT going to “repay” the Social Security IOUs. Part of the strategy here is to deliberately under-report inflation so that the future Social Security liabilities have less purchasing power than the current IOUs.