Sorry to say we have been participating in large numbers in athletics for such a long time. What has changed? A few stars come up from time to time but nothing changes. I don't think anyone should be sent unless they cross the A qualification mark. Look at shooting wrestling even badminton. Boxing. There our Olympians are mostly true competitors pushing for medals. Only few of them will win but most have potential too. That has to be differentiated from the no hopers in athletics table tennis etc where we have been participating for a long time without anything tangible. This nehruvian idea of participation is better than winning has led us here. So many nations have much smaller contingents and are so much poorer than us still win more medals. For a lowdown on that - check out the GDP based medal tally.