Ok, let's try this out.
Can you tell me why we are accepting of a promiscuous life, full of ourselves, who stuff themselves yet want the newest phone?
It is a façade to say that we (in the united states) want to live a pure life. We thrive on corruption.
As I implied above, Lust, Gluttony, Pride, and Envy are slowing being accepted as the norm as well. Does this mean that they are becoming more like greed in your eyes? Or are there benefits to those sins like I have mentioned before?
I never claimed greed to be the only source of corruption. Like all sins greed too flows allong the others. As you and Hijiri suggested greed and gluttony are linked. You yourself will probably also see the link between greed and your example of envy. I merely state that no other sin has become quite as institutionalized as greed. And that no other sin allows for such barbaric acts to be excused, quite like greed.
We all want the newest phone, true. Like we all want Nikes. But we don't care about Ipod city, nor sweatshops. While I can see why you call that envy, it falls under institutionalized greed as well. We all want steak and tuna, but we don't care about methane pollution or overfishing. It's gluttony, for sure. But it's also institutionalized greed.
But these two specific subtypes of greed don't excuse actively, in your face, mistreating of people. I myself, today, in the line of my job denied a woman the funds to go and live on her own, away from her boyfriend. I was in my right, to do so. Imagine that. I followed the rules. I did the social research. I found her non-fitting. I denied her request. And now she's going to be sued for having already signed a lease she can't afford. And everyone around me keeps telling me I did the right thing.
Don't tell me that's right. Don't tell me that kind of institutionalized greed is okay. I'm a bad-guy today. And everyone but one woman and one man excuses me and applauds me. It's sickening.
I also don't necessarily agree that we've become all that more promiscuous. One would have to define promiscuity before we could even evaluate that. And in any case I don't see why that would be 'a problem'. The defendant of lust may want to speak out on this, but I think lust is the least bad of the sins. The only possible bad side-effect of lust is rape. (Which one could see as lust meets greed and wrath by the way.) And don't get me wrong, rape is one of the worst things in this world. But lust and promiscuity are not, by far, it's synonyms.
Pride? Well fine, people are full of themselfes. And yes, society pries on that. Marketing campaigns are a great example. But selling new-age-bullshit-anti-aging-cream isn't going to put people out on the street. It's not going to give people the right to take away all of some people's tools for survival. And for the relatively few people who do end up spending most of their cash on pride-enhancing merchandise; it's the institutionalized greed of the companies that finances this problem.
But as to your question; are they becoming more like greed or are there any positive side-effects? That's a false dichotomy. I never denied your list of positives of sins, including for greed. Nor did I ever deny that fighting and stealing in the dog-eat-dog-world won't keep you alive in the dog-eat-dog world.
Are there any possible positive side effects? Probably. But the main driving force behind the dog-eat-dog world is greed, and that's why it's the worst sin. And the mere fact that there are positives to dispicable traits in a horrible system does nothing to improve the traits in and by themselves. Especially if they corrupt the system.