"Hi yes, I'm Mr. Museum and although we called it the $1,000,000 cube it actually contained about ~$1.5m. This man has stolen $500,000. Send him to the gulags"
Imagine them opening up the cube and seeing the Styrofoam in the center... I'd be like; "Typical Fed behavior! Fractional reserve banking... Ladies and gentlemen of the jury, this is exactly the same thing they've been doing with your paychecks."
I think where the metaphor falls apart is the part where they bribe the jury into delivering a guilty verdict; offering them jobs at Goldman Sachs and JP Morgan, each earning $500k per year.