I'm sure we could have a long love fest about this.
Whilst I definitely think you have to include pensions in the national debt, the only source I can find that includes it is the Daily Mail. It would be nice to see though! Still, I dug this picture out:

It's quite misleading at the big spike due to the massive drop in GDP at the time, but you get the point. Couldn't find one for the UK though

I've known about the pension thing for a while. The last two years I've been able to pay about 200 pounds into NI only (because I barely worked) to get 2 years more out of the 30, but it still worked out to be a poor investment given money supply growth % - change in pensions per year % (not even accounting that the diff. will get worse!!) at (atleast) 42 years distance away.
Back on the infl/defl though, did Japan just not print any more physical cash in the nineties?
n.b. I've been wondering whether to start a "Enforce 100% capital reserve ratios" thread for a while. In such a system, all the increase in the money supply the government "gets", so they can pay down the national debt, as opposed to - given a 40:1 rough m4:m0 ratio - the government getting a mere 2.5% of all money "made" each year today.
This system also means that banks would be considerably more liable for any dodgy loans they made (in fact, precisely as liable as you or I would be for any dodgy loans we made). In such a system it would be beneficial (though today we can both see why it's a horror for all) for the government to lend money to banks on their collateral, as the money the government prints and lends to the banks will be the entire increase in money supply (as opposed to 2.5% of it), which the central bank produces at no cost, and gains back at interest (actually decreasing money supply over time, allowing it to print more money and lower taxes!!!). Or the underlying asset in the case of default.
I don't know if there's much interest on the board though...