Your quotes simply show that it is very difficult to replace a bureaucracy overnight. But the motivation is clear: Nazis were not welcomed with open arms, they were begrudgingly hired when there was no other choice.
That’s not evidence that they were redeemable, that’s evidence of pragmatism. Your own article provides no better proof: this policy was not widely publicized at the time and caused embarrassment when finally brought to light. Why be ashamed of hiring someone who really is “redeemed”?
And as time went on and the need became less acute, a Nazi past presented a greater and greater obstacle to power in Germany. Today it is almost fully disqualifying. That’s the opposite of redemption.