Marble Wall Coverings

I've been in the homes of some pretty wealthy people.  They weren't billionaires by any means, but they are well off.  I have seen enormous rooms with unnecessarily high ceilings and televisions bordering on the absurd.  I have been in swanky, downtown office buildings of hugely profitable companies.  I've seen some nice amenities is what I'm trying to say.  Today I was in the county Marriage License Bureau - the epicenter of the mundane - and the room was covered in marble from floor to ceiling.  This led me to develop what I am going to call the Marble Law of Finance:

Nobody covers a wall with marble using their own money.  

This is a helpful realization.  If I am ever abducted by aliens, wake up on a marble floor and look up to see marble walls, I'll know I'm in one of their government buildings.