I pirated mine, and it is not because money was an issue. I already have a copy I bought new for the PS3.
I spend money wisely, and I reasonably ask myself if 60 bucks is worth going towards a game that has no productive nor memorable contribution to my life. I just got back from Italy, and I think to myself...see 60 bucks in Italy you will be able to see the Coliseum, St. Peter's Basilica, the Spanish Steps, take a train from Rome to Florence, have coffee sitting by a fountain under the Leaning Tower of Pisa, have dinner, and pay for a taxi back home. All of that within one day in Italy for under 60 dollars...not too shabby. OR that 60 dollars could go towards paying for a room at a nice inn for one night in Venice...or ...you can buy dinner for a homeless person instead of giving it to a corporation.
Either way, there will ALWAYS be a good population who LOVES LOVES a game enough to pay 60 dollars for it, that's fine. Heck I stood in line waiting for Uncharted 3 to be released because i LOVE LOVE that game, but only so because I have traveled to many of those places already and I enjoy the memories it brings me. Whatever people's reasoning is for pirating, it comes down to whether or not a game is (to them) valued at 60 dollars. If the marginal benefits outweigh the marginal costs...then yes go for it!!