stumbleupon- The Times- water on the moon may boost nasa into 21 century space race

This article I stumbled upon is about the finding of water on the moon is saving NASA. NASA is struggling with technical problems and underfunding of the program. President Obama has set a goal to launch the space ship in 2020 with the cost of three billion dollars a year from the government. Doesn't that seem a little to much money to be spending on something that we have already discovered? Couldn't we use that money for something else like maybe explore more of the solar system?