The good developers generally have no trouble finding jobs, and therefore don't need recruiters' help. With the best and the brightest taken off the pool, the recruiters are mostly left with merely the mediocre and the bad ones. This in turn has collateral effects: any developer coming in via a recruiter already carries the stigma of "not good enough to find job on their own".
Who did recommend those useless candidates to you? A recruiter, perhaps? Read this horror story: http://bostik.iki.fi/aivoituksia/pages/recruiter-anxiety.htm...
The good developers generally have no trouble finding jobs, and therefore don't need recruiters' help. With the best and the brightest taken off the pool, the recruiters are mostly left with merely the mediocre and the bad ones. This in turn has collateral effects: any developer coming in via a recruiter already carries the stigma of "not good enough to find job on their own".