> Old ideas and old people last to long in this business, they need to be overthrown more quickly.

I'm not sure how literally you mean this, but have you considered that old people are still humans, and after a certain point it's a lot more likely that they have a family to support, need more medical care, plus a bunch of other things? You can't just throw people out because they are no longer as fresh and efficient as they were in the beginning. Being old comes with it's own advantages. There's a place for everyone in the business.