As long as ppl r there to work for those salaries I don't see any problem.
When u r in college, you dream of job....once in job u dream of high paying job and after the move to high paying company, you again dream of much better salary after 1yr....and again jump....NOTHING WRONG>>>>COMPANIES NEED YOU TO MAKE MONEY AND YOU NEED COMPANIES TO MAKE MONEY>>>>SO JUMP WHEN THERE IS OPPORTUNITY RATHER THAN BLAMING THE SALARY LEVELS>>>>THERE ARE HELL LOT OF PEOPLE WHO R READY TO REPLACE YOU FOR SAME OR EVEN LOW SALAY