So lets say you are a producer, you have some money, and you somehow got Richard gear and Bruce Willis, so now all you need is a script...but , why bother? see, this movie is really terrible, the acting is pretty good, but the casting is awful gear and Willis did their best to play these characters they simply cant play. now, this movie has no plot, or rather, there's something that tries to pass off as a plot: there's a mean hit-man (Willis) who is cool dangerous and sophisticated (actually he's none of those things, but from some dialog between the other characters, you are supposed to get this impression), so this hit-man is on a mission to kill someone, now there's an ex-IRA prisoner who is kind and nice and very likable (gear) who the FBI release from prison so he will help them. so now the FBI is "investigating" to find this hit-man, the investigation consists of a series of unlikely information - like some random person lost his wallet and someone used his name to buy a car - which is always right on the money. since there's no real plot and the script is so crappy, you cant expect any real character development, or tension, so instead of creating them through the story, they simply add some disconnected dramatic music, which signals you that something very dramatic is going on , instead of actually creating something dramatic..
the bottom line is that this is a very bad movie, and a complete waste of time which somehow got an incredibly high score for its level, probably because of the cast - and this is exactly what the producers where counting on.