[GSlob]

The assumption is that for quite a few jobs [beside the pilot's - say, the bus driver's, - another position where a worker is entrusted with the lives of others] I'd need to know-in real time-whether the person is impaired. More, I am concerned not so much about the existing pilots [they are already being checked, if one is to believe the MSM] as about the existing addicts who might wish to become pilots. And while airline pilots are checked- there are not that many of them, after all- expanding the occupation list significantly to include, for example, the bus drivers, etc. would require a pervasive surveillance system.

[Trailerpark Badass]

More, I am concerned not so much about the existing pilots [they are already being checked, if one is to believe the MSM] as about the existing addicts who might wish to become pilots.

You're REALLY worried about that? Pilots would still have to be hired, go through an interview, produce a stable work history, etc.? Do you really worry that a hard-core drug addict will be hired as a commercial pilot, not to mention getting licenses, passing flight physicals, etc.?