If I dislike the person's job because I think it is unethical (ex: corporate attorney specializing in representing corporations accused of polluting or shit labor practices), I'm out.

If I dislike the person's crappy income but see that they are happy at their job and responsible enough to live within their means, I'm okay but watching out for signs of leeching.

Bad credit that could impact my future ability to get a small business loan would be an issue.

If I think the person makes shit money because he's fucking off at work, or lazy, or missing work, I see that as shades of things to come. This isn't about the job, then... it's about my strict No More Lazy Bastards rule.

Being alone is easier than letting some ass mooch off ya. Really. If you have a mooch on your hands, cut the ties... it gets MUCH worse after they realize they can get away with it.