Hi there, very interesting question.
I believe we have less free will than we think. We can make our own choices however not without consequences. It always comes back in some form or other.
I am not quite sure what you mean by our brains being wired, if you mean brainwashed, I believe if we allow ourselves to be and not think for ourselves than yes. So many of us believe anything out there and this is a form of "wired brain" as you put it.
However with so much going on in the world, all the evil and destruction, I believe that this may be consequences to our actions on this earth to some form.
I believe in a higher self (The Holy Spirit) whom is controlling more than we think.
A good example of this...........when OJ Simpson was on trial for the murder and was acquitted for something I believe he did, and then laughed his way out of court. (reason for that) he could of served his time by now, but instead his laugh received him a life sentence anyway and he took a huge fall from grace.
This is just my opinion, be interesting to hear other opinions as this is a very good question that could go so many ways.