Why hire local talent when you can get a foreigner who will work for cheaper? (Not to mention the foriegner will also work under the shadow of having to go back

Why hire local talent when you can get a foreigner who will work for cheaper? (Not to mention the foriegner will also work under the shadow of having to go back to their country if they get fired..) While there might be a good argument for this, I've never seen proof that it was not being abused.