US companies bring in these consultants tens or hundreds at a time to a single office. If they hired locally for all these positions, they'd have to pay a lot h

US companies bring in these consultants tens or hundreds at a time to a single office. If they hired locally for all these positions, they'd have to pay a lot higher than 20% premium. And if they flew in consultants from around the US, they'd be paying a fortune per hour (how many good USA developers seriously consider 100% travel jobs unless they pay ridiculously well?).