Nothing like this is ever going to happen. It would be incredibly expensive (on both the employer and the government side) to administer, and it would be portrayed as a tax on hiring, because that's exactly what it would be.

Rules about what a job posting can and cannot say can definitely happen, and have happened (see: salary ranges, because of Colorado's requirements). That's what CNBC depicts this proposal as comprising. Unfortunately, under the hood, it's closer to what you're talking about.