This is seen as a perfect kill system because:
Young Joe is a Looper. He’s had a messed up past, no real parents, and had his lessons on life given to him by a man from the future who gave him a gun and taught him to kill. Needless to say, Joe has issues. He drops designer drugs in his eyes all day, frequents prostitutes, etc. But Young Joe also has heart, studies French, dreams of traveling to “better, more sophisticated” places than Kansas, and gets all vulnerable about childhood and parenting with his prostitute lady friend (Piper Perabo)… Somewhere in that stoic hitman there’s a heart – though often it gets buried beneath the selfish ambition to “get his” in life, no matter what the cost.