Are the oldies required in the present setup?

If one looks at the scenario superficially, then the oldies would nowhere be near in their scheme of things. But I feel presence of Rahul, Sachin and Ashish rendered solidity to our line up. Moreover, they can pass on their valuable experience to their successors. If we consider Sachin and Rahul, they has come to the fag end of their career. They have nothing to prove in their illustrious career. In my opinion, the most important reason is for the youngsters to understand that no one can take their place for granted. The youngsters, like Rohit Sharma, Sreesanth, had become so casual and reckless, that they took their place for granted. No doubts about their potential to replace their worthy predecessors, but they were falling short in their attitude and their willingness to learn from their mistakes.
Therefore, the sudden reinforcement of our oldies should give them tremors in their belly and wake them up from their deep slumber.
I accept that their presence is going to be pretty short, but I’m sure that even their short presence should be worthwhile experience for all the stakeholders!