Spray and pay works for sending people a little underqualified for a job. Sending people who don't know why they've been put forward for a job under false pretences just means the client won't interview any more candidates you send, especially if that candidate is plenty employable enough not to bother bluffing their way through.

And unlike candidates, recruiters can potentially get paid to fill a lot of a company's vacancies, provided they don't get blacklisted by them...