Except that you don't have to spend money to get returns, especially in the world of Major League Baseball. And you should never spend more money than the returns are expected to contribute. You're recommending a course of action that has an extremely unlikely chance of paying off financially and a shaky chance of even paying off on the field.
Obviously, there are only a few teams that make the playoffs. Also, it is quite obvious that there is only one winner. You shouldnt be an owner of a team unless you are in it to win. There is no point to being an owner and not making the necessary moves to win. If we do not add any solid talent over the offseason, we will not make the playoffs. Jeff Bagwell has come out and stated that we need help if we want to compete with the rest of the NL. Standing pat will not get the job done. Also, the math you did with Colon's win total and Hernandez's is not correct. You have to look at the whole starting lineup. Last year, we had 10 different players start games for us. We won a combined 62 games. With Colon, Oswalt, and Miller, we could easily eclipes 50 wins. Throw in about 10 wins with Hernandez and another 10 or so with Reynolds. Thats about 70 wins from 5 pitchers as opposed to 62 wins from 10 pitchers. Its a trickle down effect. Getting a number 2 calibur pitcher means that your #3 is stronger, which means your #4 is stronger, which means that your #5 is stronger.
Yes, your points are correct. But, the way the team is now, chances are that we will finish 2nd or 3rd in our division and 8th or 9th in the league. It would be nice to see our team at least try to improve on last season. Not that they have to go out and try to get a superstar, but at least go out and try to make the team better than it was last season. You must keep up with your competitors, and as it stands now, we are slowly falling behind.