I don't know how your company works but at mine we have a profit target associated with our annual bonus. By eliminating that waste I am helping to ensure we hit that target so I get paid. Imagine if I let it slip and we missed our target by $200,000 that would be dollars coming right out my pocket.
It's an effort vs benefit calculation. Can you say how much of that savings will translate to dollars in your pocket? In most large companies, we can't. And when you're in a company making tens of billions, a saving of $200K is rounding error.
Then there's the psychology of it: If enough other people work extra long hours to get those savings, they're not getting a larger bonus than me who isn't. When you scale this kind of reward incentive, what you'll get is most employees not bothering - they'll get the bonus anyway.
Value per hour might be a little low there, but they have certainly done more to align incentives with employees than my employers have. I do get bonus, but it is a fixed percentage based on getting above "meets expectations."
