What the heck? Why not just let employers check hour freaking photo out against the documentation you already provide?
Employers are not agents of the Federal government. You propose to put them in jeopardy unless they perform to a degree statistically exceeding what we expect of law enforcement officers in a function for which they are not trained. They have plenty of challenges providing jobs alone. To ask an owner of a dry-cleaning shop or restaurant to be able to check the veracity of documents is ridiculous. I propose to train those who would seek to perform investigative work on a voluntary basis. Let them figure out how to meet clearly defined standards of evidence.
The whole point of the Second Amendment was to make the whole people the national militia, such that we would not need a standing army to operate with powers that threaten the liberty of citizens by precedent. The militia were to get practice, such that they were "well regulated" under State command. It is a truly libertarian idea much like the Swiss Army.
More importantly, this plan IS what the Supreme Law of the Land specifies. What you propose is not, and for damned good reason. I think it preferable to learn to use the tools we were given instead of inventing new illegal powers by an unconstitutional executive process, powers that have terrible potential for abuse.