I'm the most productive engineer on both of my teams and have been for the 4 years I've been working at both companies. I don't tell them. Nor do I tell them about my sexual proclivities, my rental income, my residuals on several albums I produced nor my stock, crypto and portfolio income. I manage all of that a little bit of "company time", whatever that means.
> What they put in the contract is unequivocally their business, don't you think?
No. We are forced to sign a ton of unfair contracts just for the privilege of working our asses off to make other people rich.
It's as much collusion as it would be if two victims of fraud agreed to go together to the police to press charges.
> If an employee is getting 40 hours of work done per week, then I don't see the problem.
You're not.
> Because it's none of their business.
What they put in the contract is unequivocally their business, don't you think?