Back then, immigration was tightly controlled, and many were turned away.
I didn't say anything about an IQ test; you did. But if they have a skill or are trainable, they should be part of a firm monthly quota.
Coming here and winding-up on welfare for 20-30 years just isn't acceptable, IMO. My ancestors all had skills, or acquired new ones after arriving.
Quotas? I happen to be quite conservative and think there should be no quotas in government. Let the market decide how many shall come. If someone wants to come here to pick your lettuce at a farm, I would gladly accept them although it's not the kind of job that most would consider 'skilled'.