http://www.zerohedge.com/markets/druckenmiller-americas-debt-crisis-its-watching-horror-movie-unfold
"those $32 trillion in US debt (growing by $1 trillion every six month) and $200 trillion in off-balance sheet debt, will stay forever... or at least until the US defaults or hyperinflates."
So, 2 Trillion per year, acknowledged... gets us to 36 T next year, plus those $200T off-balance-sheet. Plus the interest, of course, which (assuming 5%) gets us another (($36T + 200T)x5%=$12T/year) with back of the envelope scratching!
And this isn't part of the bank issue, really. Except it is! I don't know where exactly those numbers come from, but let's presume it is true. Is that useful for your curve fitting?
I've long said that DEFLATION IS VOLUNTARY (the US Gov can always just sidestep the T-bill and Federal Reserve pretense and just nakedly print $500T or so ot pay off everything. And, so, for that reason, I long ago discounted it as the ultimate danger.
But it could still be a pretty exciting dip as the rollercoaster drops out from beneath our feet (and the credit card "seatbelt" stops working)!
The important thing is we keep those foreign military bases and adventures going We may need to talk "sense" to the "depositors" if they keep insisting on getting their principal back!
And, again, your curve fitting started some time ago, when the T-bill rates were much smaller than now!