Don’t think that works for words that don’t have a verb as a base, i.e. Krankenpflege works because Pflege is a Verb and can be conjugated to Krankenpflegende but Mechaniker:in doesn’t conjugate.
Also Geborgene means nothing even adjacent to being a Bürger. I’d personally would have guessed Bürgende but even that is a major stretch. You would either have to create an entirely new way to conjugate nouns or you have to use synonyms that can be conjugated that way. Both ways will be a huge change to how German is spoken
Scammers evolve to find new prey. While the phone scams and the different types of phishing might still work, I am quite that’s not where most of the money is now.
We’ve seen kickstarter, bitcoin, mlm scams and what not. There’s enough out there that have not been properly identified, too.