Not easy. The job market is very dynamic, moves fast, changes fast. Any government bureaucracy is slow and would be managing immigration for last years fad.
Better to have no quotas, but pass laws that no immigrant, legal or illegal, gets welfare (by whatever name). Then only workers will come here and not parasites. The parasites already here are a much bigger problem than hard workers even if they compete with me for a job.
Youre proposing open or near open borders. Dont be surprised when people disagree.