[Know your rights]

What other relevance could employer testing have to drug legality than as 'evidence' that drugs should be illegal?

It is not necessary to force ALL employers to test in order for employer drug testing to have relevance.

A claim is not an answer. How is testing by some employers relevant to the issue of drug laws?

[robertpaulsen]

"How is testing by some employers relevant to the issue of drug laws?"

You mean drug testing by public corporations involved in free market enterprises. Well, they're saying that they take the drug laws seriously and will not tolerate their employees breaking the law.

Relevant enough?