rising salaries are due to competition ... for long Infosys and wipro types have paid less and attracted the best ... now the spectrum has widened and the "best" has choices including a better paycheck. These companies have made a killing, some time to see a cut in profit to survive in this competitive world.
US does not have employment crunch. They just want to cut costs. The result is that today US software companies like IBM and Accenture are competing with sambhar drooling, unshaven programmers from Infosys and Satyam.