Tough one, it's a complicated mix of societal problems like greed and dishonesty right from the start, fuck if I know how to fix those.
On a practical level we'd have to make the certification process legit somehow. Some are ridiculously easy and plain silly. For example open book. If Westside is open book is a trainer actually gonna commit to learning the info well enough to understand the process' and apply critical thinking towards solutions? Or just carry the book around?
So the testing would have to be harder but then what if the testing org doesn't have its facts straight? You might have to give the answer you know they want rather than the correct one just to get the marks.
And how about some electrician that got certified 30 years ago but can't remember where his glasses are or tell his ass from a hole in the ground?
I could write a book on what makes it hard to answer. I know it's common to prod for a solution when someone points out a problem, fair play but sometimes their just isn't a realistic one. I don't think this will ever be fixed.