During my career I've witnessed a stark contrast between different visa holders:
1) Exceptional — the best and brightest from all walks of life. IIT Delhi to NUS Singapore. Hands down amazing folks who consistently outperformed their peers.
2) Cheap(er), mediocre — predominantly H1B holders from India and China. Varying degrees of output and communication skills. Mostly “slow tracked” for promotion and given the lowest salary in a given position’s range.
My perception is that the startup community has generally ignored group #2’s existence. It’s not very surprising when you consider who the top 5 h1b sponsors last year: Infosys, Tata, Wipro, Deloitte, and Accenture[1]. Most startup folk would likely be surprised since we usually associate tech companies -> Google instead of Wipro.
Logically your thinking is spot-on, but I'm not so sure the truth is so black and white. Consider the psychology of an h1b holder from India who has a 7 year wait to get a green card -- how is that person thinking about aggressive career moves? The answer is that they probably aren't.
I bet if you looked at relative rates of employee churn you'd find visa holders stay with employers longer than their counterparts. They are probably also less likely to push for raises / promotions since their negotiating position is somewhat compromised by them needing another employer to transfer this visa to (possible, but very stressful). There is also likely a sense of indebtedness to a company when someone is first sponsored. This is probably the biggest difference when considering the cost of Group #2 vs similarly qualified domestic labor.
Now consider those top 5 h1b sponsors again -- how does their workforce stack up? My intuition says they aren't the best and brightest from group #1 (don't know how to prove or disprove this just my qualitative observation).
What seems to be happening is that we have huge consulting firms sponsoring labor from Group #2 -- and these companies are run by smart folks. They've developing a well-oiled machine for employing a more loyal workforce, at less cost -- and while the quality isn't as high as it could be, it's good enough to make their business model work. This is the exact opposite model of startups (and large, but highly innovative companies like Google) who want to only hire from Group #1.
As a founder I've experienced the Group #1 labor shortage first-hand but I also worked with Group #2 in the industry and both experiences left me leaving a lot to be desired with our current immigration policy. I see both sides of this debate, but from my standpoint everyone is right. The disconnect seems to be that "anti-immigration" camp is fighting against expansion of Group #2 while startups and innovative companies like Google, et al. are fighting to increase visas for Group #1.
What can we do to bridge that communication disconnect?
[1] — http://h1b-visas.findthecompany.com