Familiar with the tale about King Midas and the golden touch? Mythical King Midas got his desired golden touch, and look at the unintended consequences of that.

Massive federal government workfare program change of this nature won't result in replacement of CBP employees by machines as much as it will result in redeployment of CBP employees. You'll likely get your kind of way in some form, but it will probably come with a higher proportion of searches and more intensive interrogation as the resources will be freed up for that.