TCS (and the other similar companies) have plenty of very good developers, but many of their clients are only willing to pay for the cheapest available, technic

TCS (and the other similar companies) have plenty of very good developers, but many of their clients are only willing to pay for the cheapest available, technically qualified, body in a seat, so that's what they get. However, if you're willing to pay for the quality (or you're a new client that they're trying to impress), you'll see some excellent people working for them.