[kabar]

Since Social Security is underfunded, the Fedgov will use an unholy trinity to bring it in-line with receipts - understate the action rate of inflation, have COLAs fail to keep up with even that artificially-low inflation rate, and then will monetize fedgov debt, which will further fuel inflation.

That is not the way it works. Latest Cost-of-Living Adjustment

The problem is that SS increases (and Medicare Part A) are not tied to revenue. They are not linked, which is why SS is unsustainable and will start going into the red by 2016 or earlier.

[dirtboy]

You’re missing the key point - the Obama Admin doesn’t even want COLAs over the next two years. So the calculation you linked to becomes moot.