>>4714109 (lb)
>H1B
It should be like pro sports. You use the visas to get the superstar players into the country, not to load up your team with cheap alternatives.
The other end of the scale is the seasonal visas. Tourist places, for example, have a problem from labor day to November because their summer workers go back to school. Farm pickers, same thing.
The visa system is abused by companies using the lower level visas to hire permanent workers and not letting the talented people who could compete for their own jobs at the top end in.