How often this is the case I don't know.
It makes me wonder if it is purely pay for each individual worker, as much as it might be conditions surrounding it.
I've worked jobs where the pay was not great, but the culture and atmosphere were great, and it was fun. I've worked jobs where the pay was better, but the culture and atmosphere were horrible and i wanted out so bad ... I would have told you I wasn't paid enough, but that wasn't the whole story.