It seems that there ought to be a correlation between education and personal income. In fact, statistics will probably bear this out. Now, a person who has obtained higher education is likely to dwarf an uneducated counterpart in terms of being informed about economics and public policy.
For instance, I have taken a look at the general education requirements at different universities and most students are required to take a course on basic economics or something similar. The information that one gains from such courses is far superior than any amount of media saturation.
Thus, while it is certainly not true that every rich person is more educated than every poor person, statistically speaking this is likely. Furthermore, even if a poor person has the time to immerse himself in media (which is doubtful, unless he lives off of welfare), the quality of his information will be much lower than that gained from a college education.