After reading so many comments and suggestions, I decide to jot down some words. First of all, you cant compare yourself with others in any anything. If the comparison gives you an inspiration and motivation to do something, it's okay otherwise dont do that. When you look somebody else's life, you are looking superficially. It dosnot tell you whole a lot about the person and his way of life style. If you whole motive is to make money and if you think that will make you happy, then PhD may not be a good option.  It's your life and your the one who decide what to do next. Even if you dont want to finish up your PhD, your in a far better position. 

One last thing I would like to add is: you may not be making a lot of money in academia but dont forget you are getting paid for 8 months. Especially for immigrants like us, you can take a trip back home every other year if you want to. Also, if you planning to raise your kids, they will go to school for free which is a big savings for you.