Let's read carefully over the first sentence there. Are you implying that we should sacrifice some degree of our fun (note: I'm not being extreme here and saying we should stop having fun) so these people can live better? It's an honest question there, actually.
Secondly, the second is something of an extreme example. I've noticed that anyone who has the funds to acquire a peacock charm, or rather do it within a reasonable time limit don't complain much about gil sellers; your high level crafters, your people who do HNM runs / dynamis.
In addition to that, I don't think these people are trying to be "uber" (in some cases, anyway), in some cases they're trying to afford one or two pieces of equipment (admittedly pricey -- Sniper's Ring, Haubergeon, etc.) that are driven higher by the economy (gil sellers / buyers aren't the ONLY problem, but they are a notable enough one)
Finally, I won't deny that Americans in many cases (if not 99%) do have a higher standard of living than most of these people. But your post almost holds the dangerous implication that life is good, we don't have to work hard, etc. etc. Some of your FF population are in fact the people who don't have to worry much about anything aside from school and their social lives (I'm not picking on these people, just noting that). Then you have the people who have to juggle school and a job (in some cases two) in order to support themselves. Don't they have the right to play this game without the hassle of these people?
You are right. I have sterotyping here. Not all NA players are uber seekers, or having easy life.
For the first sentence question, I do have personal view that spending hours, and lying to someone trusted you, to hunt down someone who just make a life out of your fun is a bit ugly. I do sympathy to some of the gil-sellers, though they did have negative impact on majority of the players.
There are a lot of methods proposed here about how to hunt the gil-sellers, I do not like with earning someone's trust and stab at the back method. It is not that it is wrong, it just that so-called "evil" method is usually a source of social disorder, ie. If you started to act dishonest, someone else will started to act dishonest to survive better. And I do believe that all honest society works better than all dishonest society. Think about when you shop Best Buy, there are 10 security guards watching at you and you pay for their salaries from the buying their products.
Whether like it or not, the society is always control by the rich class, more or less. They always hunt down a way to cheat. Think of real life, the company entity pays only 15% tax, while you as individual pay 30% tax. That's how the CEOs pay their houses or cars. And you never complaint about these real life cheaters who hurt you much harder than gil-sellers. And believe that it is right because complay with the laws. What is laws then? And who makes the laws? In democratic society, people never really involve in making the laws, it is the rich class. And "People making the laws in democratic society" is the illusion these rich people gave to you.
This probably for some people is quite depressing. But the society is always works in a balance way. If they gone too far, the society will create a new balance. I.e. SE will take more rigorous actions, players will hunt them like crazy.