The unbridled consumption of corporate media has resulted in the erosion of; critical thinking skills, and many forms of rational thinking in our society.
It may be a contributing factor but I don't think it's the only cause. It may not even be a significant cause. I would put the blame firstly on degradation of the education system. Maybe the changing of people's main source of education from schools to media could be the cause.
'Corporate' is vague: monopolistic, monopolistic competition, & disperse markets> different effects. In former, corporations experience weak incentive to provide rich information (requires critical thinking); in the latter, the most. In conclusion, effect on consumers related to number of companies