Okay, call me dumb, but I don't get it. I looked up wikipedia, and I still don't get it. What, in economics, is analogous to fermions and quantum state?
Assertion: In any modern economical system, capacity exists to produce small houses for "everyone who wishes one".
Disproof: For certain possible values of "everyone", the Pauli Exclusion Principle prevents the simultaneous existence of a sufficient number of distinct small houses.