In its effort to counter the significant economic difficulties since 2008, the US government has added, or will have added, around $4 trillion in deficits (financed by new debt) in its three fiscal years 2009, 2010 and 2011. Yet, all this massive government deficit spending has failed to really ignite economic growth. Most likely this is because of the enormous dead weight of unproductive and onerous private sector debt, particularly that of consumer debt. Hence, real US GDP will have increased probably less than $1.5trn during these years. Including some further economic benefit in the years thereafter, a total GDP benefit of only about $2trn is probable.
So, $4trn borrowed for $2trn in GDP gains. Thus, in very rough round numbers, each new one dollar of US government debt might only produce $0.50 in new economic activity and probably only about $0.08 in new federal tax revenue. (Federal tax revenue as a percentage of GDP is around 15 per cent.) Therefore, the economic marginal return for each new dollar of US government debt is possibly around -50 per cent! If you loaned someone $10 million and they gave you back $5m, you would not be happy!
Hence, it might not be long before those holding or buying US government bonds perceive the reality that the US government, and US economy, are losing massively on government borrowings. This will result in much, much higher US government bond yields and interest costs. Most importantly, it may make the rollover of US debt and new debt issuance incredibly difficult unless either US taxes rise stratospherically to cover the deficits, and/or the US Federal Reserve money printing goes into hyper-drive to purchase the debt the markets will not buy. (Of course US banks, pension funds etc., could also be forced to buy them.)
Thus, the idea that US government debt continues to be ‘risk-free’ is absurd.
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