Correct. There is pretty much no incentive not to try to punch above your weight class. If it was common for employers to list salaries on their job boards, I'd spend an hour each day applying for every job that pays more than I make now. There's literally no down side.
Opportunity cost and the potential of leaving a good company for a potentially toxic work environment are two bad outcomes that I can think of off the top of my head.
I'm not saying you shouldn't try to better your position, but saying that there isn't a possibility of a downside is not fair.
