Sure, but that's a classic tragedy of the commons. I've been applying selectively to some places over time, and have had less than 10% even send me a rejection letter. As an applicant, if I actually needed a job, I can't afford to send out a handful of applications and wait 2-3 weeks to find out if I'm even being considered before sending out more.

EDIT: Now that I think about it, I've often had companies who did interview me take weeks to initiate the process from when I applied.