Why does the IOC limit the number of sporting events (disciplines)?

Question

I have been trying to figure out why the IOC limits the number of sporting disciplines to be featured in the Olympics. I read their charter and it doesn't explain their reasoning behind it, just that they do it and that's that. While there are many different events included in certain events (i.e. beach volleyball and indoor volleyball are considered one discipline; swimming, diving and water polo all fall under the aquatics category), it is silly that baseball and softball are going to have to fight to get their position in the Olympics back in 2012 against the likes of Rugby, Golf, and Karate. So I want to know why everyone can't join if they meet the required criteria?

Answer 1

One of the reasons is that it's VERY expensive for the host city to put on the Olympics and each type of event that is included further increases those costs, especially if the city doesn't already have an appropriate venue to hold the event.  

Answer 2

because they dont want the Olympics to become business focused, the more events you have the more you have to pay for it, which means involving business. I wrote a research paper on this issue a little while ago.

Answer 3

They have to draw the line somewhere.  Otherwise every sport would want in.  I have nothing against rugby say as a sport.  But I'd hate to see bodybuilding or ballroom dancing or tiddlywinks in there

Answer 4

To include an event in the Olympics, it must be practiced in a significant percentage of the countries in the world.