Are you actually agreeing to specific hours? For example, in a contract, as an hourly worker, or with some formal arrangement with the company?
If so, then yes you should only work those hours.
However, if you’re a typical full-time employee in most countries you don’t have agreed upon hours.
> If I'm an employee with miniscule equity, why would I put in any more time and effort than what was agreed?
Again, if something was agreed upon you should follow that. In most full-time jobs they’re not going to specify a maximum number of working hours. It’s your job to explain what can be done in a workweek and push back when something can’t be done. If it persists and you don’t like it then you find another job. Vote with your feet.
If so, then yes you should only work those hours.
However, if you’re a typical full-time employee in most countries you don’t have agreed upon hours.
> If I'm an employee with miniscule equity, why would I put in any more time and effort than what was agreed?
Again, if something was agreed upon you should follow that. In most full-time jobs they’re not going to specify a maximum number of working hours. It’s your job to explain what can be done in a workweek and push back when something can’t be done. If it persists and you don’t like it then you find another job. Vote with your feet.