That's a wonderful idea! Money addiction!
"Have you acquired large amounts of liquid assets? Do you feel as though the desire for more wealth is consuming your life? Is your estate becoming burdensome in its enormity? Come to the Greed-Addiction center. We can help! I guarantee it! Cash, credit and money orders accepted."
It would be cool if it was alive today...
Yeah... That would roc!!
"You are screwing yourself and your fellow employees."
If you're not exempt, and especially if you have a job that logs time, this has to be reiterated. You may be willing to trade your free time to help yourself, your team, or your company. A world where nothing ever goes wrong could accept this kind of behavior. Unfortunately, we live in a world with lawyers (apologies Ray if you're reading, you're my hero). If you're off the clock and anything that needs to be "official" (read: "documented") happens, your life just got a new headache. "Why were you there? Was it your fault? Were you involved? Again, why were you there?" If your coworker sues because they feel like their job depends on doing unpaid work, what will you say when they ask you the facts? Who have you helped then? You make yourself more of a liability by working off the clock. To me, the cost outweighs the benefit, from the perspective of both employer and employee.
The hardest part of climbing the ladder of success is getting through the crowd at the bottom.