I would not be so quick to absolve scientists and engineers. Nothing is easier than to find a scientific or engineering "expert" to testify to just about anything. Scientists holding PhDs are at the forefront of pushing global warming junk science. Everyone understands that lawyers are paid to advocate their clients' positions. Not everyone seems to understand that many (and probably) most scientists are also primarily guided by their self-interest. Where there is free scientific inquiry, the truth comes out in the wash. Having the government pour billions into promoting positions favorable to the growth of government corrupts this process.