Let’s work a concrete example.
FNM borrows $1B from Citigroup at 2.5%.
Citigroup borrows $1B from the Federal Reserve at the Fed Funds Rate of 2%.
The Federal Reserve prints $1B of new money to loan to Citigroup. (Actually, $100M and the magic of fractional reserve banking creates the remaining $900M.)
FNM is borrowing directly from Citigroup, but indirectly from the Federal Reserve.
The net effect is that the average joe pays the cost of FNM’s borrowing via inflation. Even if the Federal government never pays a dime to back FNM’s debt, the guarantee means that FNM may borrow as much as they please.
This is a good deal for Citigroup. They’re borrowing at 2% and lending at 2.5%, making a riskless profit of 0.5%.
This is a good deal for FNM. They’re borrowing at 2.5% and buying mortgage bonds yielding around 6%.
Where does this profit come from? Citigroup and FNM aren’t doing any actual work, so the profit must come from somewhere. The answer is that everyone else is funding Citigroup and FNM’s profits via inflation.
Usually, when a large corporation guarantees the debt of a smaller corporation, they qualify for a bailout in the event of a disaster. Technically, JP Morgan Chase was responsible for most of Bear Stearns’ debt, because they were the clearing firm. In practice, JP Morgan Chase got a bailout. The bailout wasn’t free. Everyone else pays the cost as inflation.
The injustice is that if I want to borrow at 2% or 2.5%, I can’t. I have to pay more, and I can’t borrow as much. Inflation is 20%-30%, while FNM and Citigroup may borrow cheaply. Everyone else is subsidizing their profits via inflation.
If you consider Citigroup and FNM to be subsidiaries of the Federal government, then yes, it does make sense for their loans to be guaranteed.
Remember that. When you pay $5/gallon for gasoline, you’re paying for the profits of FNM, Citigroup, and JP Morgan Chase!