[hampereddustbin]

This issue would be above the developer's paygrade.

It's not the developer's job to make requirements fit in the timeframe, that would be the manglement's job. If execs have made bad decisions with regards to the developer's input on what it's going to take, the problem is solely on them.

[gpvos]

That's a rather idealized view. In practice, management has more than enough ways to make it the developer's problem. Of course, that may mean it's time to leave.