Honestly, they should look at how you did overall per subject instead of "pass or not".
Isn't that a bit of a slippery slope? Take me for example, I apply for a software/web development job, I passed Matric, got 3 As, 2 Bs, 1 E and a D for Maths, I can do the job, the whole 9 yards. Yet the guy who can barely do the job gets the job cause of his maths mark in Matric and I get disqualified. So, many job applicants' applications would get disqualified cause of a technicality? And anyway, this might be a personal thing of mine but honestly, the whole "You have to get 60+ in Maths to be able to be a good insert career here (there are really few careers that actually require high maths marks)" is bullshit. I knew people in high school who struggled with Maths like me but excelled in other subjects like languages, technical subjects like Electrical, etc., IT (like I did) and so on. So while I agree that standards are a bit low for the NSC, putting up requirements like "you must have a whatever in whatever subject" and ignore all other achievements/qualifications would just not work.