Wow, that Legrand strip is just epic failure; from the looks of things, the small cord is the least of its problems.
I'm not sure exactly what it takes for the brass to tarnish
that badly as happened to the Kopp strip, but in Australia there's no specific requirement to protect brass (as far as I'm aware) - although most moulded plugs nowadays have nickel-plated pins anyway. Many rewireable plugs here have nickel plating on only the earth pin, which seems to be just to make it stand out visually; on many older plugs, all three pins were plain brass.
