Your comparison between normal and social economic models within these games is interesting, especially how you equate it to ethics. But if you're going to gripe about people who spend enormous amounts of money who may not have it (ie. addicted players) you also have to consider people who spend enormous amounts of time as well.

Because if you're going to go there, then its equally as harmful spending time away from your friends and family in front of a computer screen, especially when you consider the fact that you don't need any money to do it.

"Yes StarcraftII, I will gladly give you $50 and hundreds of hours of my life away, but thank god you're way more ethical of a game than that one that takes up 2 minutes of my bus ride and cons me into spending $1.99 on my way to work"

Addiction is everywhere. Its a sad fact of life. There are people who are addicted to shopping, but Macy's doesn't turn away repeat customers. There are people addicted to food, but Olive Garden/ McDonalds doesn't turn away morbidly obese people. There are people addicted to drinking, but Safeway doesn't do a health scan and deny these people from buying liqour. Similarly, I wouldn't expect Zynga or Blizzard to be like "hey, you've spent $10k/1000 hours on my game, why don't you go see your family or put your money to better use".