Unfortunately drug addiction does not stay isolated to a fixed dosage at a fixed price. It becomes ever more addictive and then the spiral starts as th habit needs to be fed.
I started off as a mere PPL student, just 2 hours a week. Then - I qualified, discovered cross country flying - more money. I craved to go places faster, so I moved up to twins. I found myself hanging around airports hoping to pounce on a helpless victim to feed my habit. It progressed, I ended up in a Corporate Jet. Now, to stay on top of my addiction it's aircraft ownership and selling myself to fly a turboprop.
Who says the similarities aren't there Bose?