The US immigration system is already strongly weighted by merit but the lack of family immigration causes a lot of folks who marry internationally to just emigrate (like me!) - the issue with attracting "good" immigrants isn't going to be solved by making it more merit based - it'll be solved by making it more fair and predictable. Families can spend decades partially locked into green-cards that can be revoked without warning forcing them to relocate their lives. This isn't an attractive option for most people looking for a new home.
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