Paracab - you've been listening to Radio 5 Live as well have you?
Not at all gashcan, but you post made me think about the wider implications of testing, tests for one industry where safety is a factor should mean tests for all industries where safety is a factor.
You are quite right and I wholly agree with you.
I fully expect breath testing to be introduced into my job (UK NHS Ambo) within the next few years, albeit probably on a random basis, the culture of blame we live in will make sure of that.