I mean, I don't take Booth's takedown of the Nordic countries very seriously, but the reason that Norway is in such great shape financially is that they have an enormous amount of oil that they sell. It's not exactly a reproducible strategy for nation-building.
For the record, I think the US economy is just fine, but I also think that things in scandinavia are A-O.K.
Household wealth alone is now ~$80 trillion per the latest Fed numbers.
That private wealth is what the US Government's liabilities actually rest against. Whether we're talking using inflation to pay the bills, in which case what's actually happening is existing dollar denominated assets are being eaten to pay the bills, or direct taxation is used.
Apple alone is sitting on $142 billion in cash. Norway's sovereign fund, which is the big reference point, is ~$800 billion. I can probably put together a list of 50 US companies that together have that much cash (not total assets, just cash).
http://www.federalreserve.gov/releases/z1/Current/
http://www.businessinsider.com/america-is-not-drowning-in-de...
http://rutledgecapital.com/2009/05/24/total-assets-of-the-us...