And when they do that, do you not consider it wrong?
Company A makes an offer for a job on June 1 with a start date of June 15 and a salary of 100.
Company B makes an offer for a job on June 5 with a start date of June 20 and salary of 130.
Should you say, I'm sorry company B., your offer is much better, but I already took the lesser offer?
Yes, I'm sure _some_ people would turn down a 30% diff., but most people will not and I would not hold that against them. If anything, it's good for you because be assured this person will not stay long at your co knowing they can potentially earn more, all things being equivalent.
For the record I don’t think it’s wrong for a candidate to pull out if they found something better. It’s all just a part of the game. All I intended to do was bring to light that everyone is guilty for playing and optimizing for their own self interest, and not just the corporations.