Based on http://www.nytimes.com/interactive/2015/09/17/upshot/top-colleges-doing-the-most-for-low-income-students.html , only 11% of Penn State students receive Pell Grants (which are available to families with incomes up to about $60,000 or so, or probably bottom half of the income range).
However, some other schools like Georgia Tech, Delaware, and Virginia also have similarly low Pell Grant percentages, despite their lower in-state net prices after financial aid.
Not sure at which level the Penn State tuition and financial aid policies are made. But low income Pennsylvania residents tend to be worse off than those in most other states as far as finding affordable colleges goes.