I mean that's sort of the point. The program is supposed to be for specialized positions that you just can't get an American worker to fill. If you've just hired 1,000 Americans into an identical position you've demonstrated that you're misusing the intent of the program.
Suppose you have a company and you need 3 people who can do X. You interview as many Americans as you can, and find 1 who can do the job. You fill 1 position with that American, and now start interviewing non-Americans and find 2 who you hire for the other two positions. This seems entirely within the intention of the H1B program.
Now suppose instead of 3 employees, you need 3000. You find 1000 Americans able to do the role, and hire 2000 non-Americans for the remaining roles. This still seems consistent with the intention.
