The question shouldn't be about what is desired but what does the compensation warrant?
If employers truly want something done they are welcome to put it in the job responsibilities and prospective employees can decide whether the offered comp is worth it; essentially the market will sort things out.
Employers would ideally desire someone that does everything and takes no salary at all but the market thankfully prevents that from being viable. The next best thing is to burn employee goodwill by expecting them to do more "in the spirit" which is what's currently happening, and this goodwill is now starting to run out considering threads like this are appearing.
> As a hiring manager I would likely feel you had betrayed my trust, and had taken the place of someone who could have contributed more.
If you want something done why not just put it all in the job description? This is in jest, as we obviously both know why. I'm not faulting you from playing the game to your advantage, but I also can't fault the other side from playing the same game to their advantage.