Unless you have kids, I would suggest you to try moving back and attempt a helping hand. If we fail, we can again look for other opportunities. Just a personal perspective.
Generally speaking, Western economies compensate much better for being highly educated or advanced scientific/engineering skillsets. The rule of thumb I've come up with, after talking about it a lot with other NRI's, is to go back only if you really "love" your home city/country etc. e.g. my cousin went back because he simply wouldn't be happy if he couldn't visit the extended family at least once a month (i.e. very lonely) and really missed the food.
If you go back and work in a job you don't like, YOU will be unhappy. That is perhaps the most important factor in making these decisions... you cannot help others unless you are yourself happy and content.