> People seem to think that number of jobs is a limited constant and if you stop immigrants that will have a positive effect on the economy. But in reality companies can simply just scale.

This is completely wrong. Jobs are zero-sum. One H1-B worker hired is one lost American job opportunity. It's not that hard to understand and taxes have nothing to do with this. Yes, companies can scale jobs but how often are they doing this and how does it help if they are also scaling up the number of H1-B workers?