Could not concur more, although I think blanket checks will be difficult to implement worldwide, ICAO notwithstanding. Hell, we cannot even agree on some sort of common rules of the air system!
Implementation as part of a company's policy will also be difficult, as the public often has the childish view that if all pilots get checked, then that must be because they're all drunkards. See the childish posts in the thread about the Ukrainian (dead) pilots testing positive for alcohol (post mortem, obviously) for confirmation. Any company implementing such a policy risks a serious negative publicity backlash, when all they're doing is actually increasing the safety of their passengers compared to a company that performs no checks and just waits for the local police to perform them randomly (and most likely, not often enough for cost reasons).
