Our problem is not cognitive?
You might want to read a paper published in the journal "Intelligence" that concludes there is a negative correlation between cognitive ability and conservative beliefs.
The reason this is true is that the biggest mistake humans make is to reason from a priori (this means knowledge derived from theoretic deduction and not from evidence) assumptions to conclusions. People tend to think like Aristotle. Aristotle made the a priori assumption that all things have a telos (an end or final purpose). He then concluded that the reason rocks fall to the earth when dropped is because their telos is to be near the earth,
All conservatives make the a priori assumption that limited government and low taxes are good. The reason they make this assumption is that two main tenets of conservative philosophy are: 1) supply-side economics; and, 2) Social Darwinism.
Supply-side economics is the view that taxes should be cut on the wealthy because something will trickle down to the rest of us (Mitt Romney famously said on "60 Minutes" that he deserved to pay low taxes because he created jobs). The Great Depression proved Keynesian economics correct (the Great Depression ended when the government began to spend massively to fight WWII) and supply-side economics bunk.
Social Darwinism is the view that the rich are rich because they are more fit than the poor who are less fit because they are dependent on the government (Romney's 47%). This is nonsense because the logic is circular. If I am rich, then it is because I am more fit and if I am more fit, then it is evident in the fact I am rich.