In short, the elite that has been created by practice of the scientific method uses the concomitant power not just to express the results of particular research initiatives, but to create, support, and implement policy responses affecting many non-scientific communities and intellectual domains in myriad ways. In doing so, they are not exercising expertise in these non-scientific domains, but rather transforming their privilege in the scientific domains into authority in non-scientific domains. Science is, in other words, segueing back into a structure where once again authority, not observation, is the basis of the exercise of power and establishment of truth by the elite. But the authority in this new model is not derived from sacred texts; rather it is derived from legitimate practice of scientific method in the scientific domain, extended into non-scientific domains. Note that this does not imply that scientists cannot, or should not, as individuals participate in public debate; only that if they do so cloaked in the privilege that the scientific discourse gives them they raise from the dead the specter of authority as truth.
there is a difference between authority, truth and power. my famous example is the use of the idea of hell in the bible…. what purpose does it serve, who does it empower, and why are there so many bibles produced that never mention hell? where did it come from and where is it going, for whose benefit?