There will always be a lawful reason to not hire a person, therefore any unlawful reasons to not hire are simply unenforceable against any employer that wisely refrains from opening its big mouth and confessing to any of them.
Essentially, such laws merely instruct potential employers to never give prospective employees any reason for anything, and they suffer the unlawful discrimination anyway. The legislators thought only of their intent, and paid no heed to detection and enforcement.
They can't fix the problem shown via experiment and statistical analysis in the article with a new law, because they law they would pass to do so already exists.
There will always be a lawful reason to not hire a person, therefore any unlawful reasons to not hire are simply unenforceable against any employer that wisely refrains from opening its big mouth and confessing to any of them.
Essentially, such laws merely instruct potential employers to never give prospective employees any reason for anything, and they suffer the unlawful discrimination anyway. The legislators thought only of their intent, and paid no heed to detection and enforcement.
They can't fix the problem shown via experiment and statistical analysis in the article with a new law, because they law they would pass to do so already exists.