They did not HAVE to apply, they made a choice. They keep the wages low to discourage Americans and when Americans do apply they refuse to hire them. They run the same scam at Mar-A-Largo and the other golf courses. This is not news - it was ignored during
the campaign.
On a similar note despite what Trump proclaimed there will be no American Steel in the Keystone pipeline - it is exempt. A Russian company has the contract - what a surprise!