Well, if cannot come-up with the evidence that private sector real wages are declining, can you?
what am I, the bureau of labor statistics? you have to have a careful examination of the wage structure, removing government and government related employment. and you must also remove the wage concentration effect of what is happening at places that do offshoring - Oracle sends 1000 engineers to India, and 50 executives pick up 7 figure bonuses as a result - those 50 execs must be excluded to get a clear picture of what is really going on.