OK, I have neither a fat chair at Princeton nor a column in the NY Times, so I will plead ignorance. Has the the US Government de facto defaulted on its bond obligations to Social Security? Is this because everyone knows the US will bail out Wall Street firms, but won't print Social Security checks someday because everyone knows Social Security can't/won't cash those T-Bonds? Because everyone knows the US "has to" fulfill its debt obligations, but not Social Security obligations, because these T-Bonds for Soc Sec are something different? Something that everyone knows and nobody is supposed to talk about? Because, yeah, it's news to me.