You want people to work harder? Pay them more for it. Or at least fairly
But linking pay-to-product can be a hard problem!
Long story short (I have refactored this comment a few times), employees are "significant investors" in the business and should be paid as such.
Stock options are a perfect example of this.
Note the "significant" bit though. Most places with "stock options" do it as a token option. A bargaining chip of employment, to negotiate and minimise costs for the company. In Australia, mostly not an option at all.
Which leads to your: "You want people to work harder? Pay them more for it. Or at least fairly"
Or as I think: If I don't have skin in the game then why should I care?
But I have to admit, I have also seen this behaviour in European engineers, so it is not unexpected.