You should probably do some research on how many of those ended up starting their own companies. And how many jobs they created.
After that you may want to rethink suspending new entries.
In order for such a statistic to be useful, you'd not only have to demonstrate it, but also demonstrate evidence that companies they start add more non-H-1B jobs to the market than they add more H-1B jobs to the market.
I have not. Feel free to educate me/post numbers or links.
How impactful would a say, 1 year pause be to that? Is the number of jobs created by H1B each year > the number of H1B entries each year?