[BoorishBears]

You're confusing two unrelated situations.

Companies that dramatically underpay are often out of touch. So naturally they expect more effort than their already out of touch compensation would indicate.

But in companies with competitive comp, you almost certainly will be expected to meet a higher bar after negotiating a higher salary.

Once you argue for a higher salary than "the other guy" the implication is you can deliver more value. People don't just forget that on your start date.