@hamilton,
I know many people like to indulge themselves with fantasies about what they would do if they had insane amounts of money, but I hardly think that constitutes philosophy.
The question about how I would fix the world is similar, unless you start by clearly defining what is wrong with it in the first place and why it needs fixing. There is by no means consensus on this, and in my opinion, this approach is self-serving, in that what you achieve is perhaps feeling better about yourself for a while, but nothing is actually done to really improve on anyone's situation.
A better question would perhaps be "what can you change about how you live in order to "fix the world".