Is it "wrong" to reject marriage if the man has a low income job / career?
One the one side, as a man you are supposed to do what it takes to succeed financially, it being clearly understood that you do not break the rules in the Quranic text while doing so.
Once you finally manage to succeed, it would obviously be a problem if the fair gender did not particularly take into account the results of your efforts, in expressing their preferences for what type of men they prefer. Being seen as a desirable choice by women, is of course one good reason for men to do what it takes. The whole system would start collapsing, if they didn't. You can imagine that removing this motivation would probably be enough to drastically bring down the levels of output and the existing standards of living. In fact, this is certainly happening already in the pagan world.
There is another problem, however, and a big one for that matter.
You see, people who are substantially more successful than others, obviously think in a different way about lots of things. If they didn't, they would also just be rather average. Therefore, you may find that such people are quite unorthodox. They even sound weird to average people. Especially when these average people are not aware of the fact that they are talking to someone who is actually quite an economic success, they will tend to reject these persons, and try to enforce the orthodoxy of averageness against them, say, the orthodoxy of low-income poverty.
Being poor themselves, those are the views that these women know -- and that they instinctively enforce against others. They are not open-minded. They think that what they know, is pretty much what there is to know. Therefore, the average woman will automatically reject someone like Bill Gates for being a crazy idiot, especially, when she is not aware of the fact that this particular "nerd" is the richest man in the world.
As you can imagine, wealthy people do not particularly like or appreciate their orthodox theology of how to be dirt poor and totally unsuccessful. That way of thinking is considered to be inferior.
It is not really the rich who reject the poor. It is much more the other way around.
But then again, you can still imagine what it feels like to get rejected by people who have otherwise nothing else to show for than their dirty rags and their rampant stupidity. So, indeed, what the hell would we need these people for?
Therefore, marrying up is not that simple.
It is actually a good thing that women from low-income demographics routinely reject relatively wealthy male individuals, simply because they do not know that these men are wealthy, while the only thing that they can see, is that these men are not sufficiently invested in their mentality of the poor, and therefore are not really "normal", with the "norm" being the misguided opinions of the lower-income classes.
Therefore, marrying the poor, is in practice not such an attractive proposition. You would also have to drop your contempt for the way they think, and as far as I am concerned, that is not going to happen any time soon.
