Each year, some 200,000 additional skilled foreign workers are admitted through a variety of existing visa programs.
At least one million skilled nonimmigrant workers are in the United States at any one time.
The large majority of foreign PhD recipients already remain in the United States under current law
>>What are you paying them?<<
The same that we pay other engineers of similar education/work background.
A few of them have Masters Degrees, so can call for salaries that are higher than someone with just a Bachelors.