  ::::To try to explain why expertise is not always needed in the specific field to add a reply, consider your replay here: Wikipedia:Reference_desk/Humanities#MPs_expenses_scandal.2C_UK.  Now, I have no problem with your reply there, even though, presumably, you are not an expert on MP expense scandals in the UK.  If you had said something that requires an expert knowledge on that subject, like referring to a secret document on the UK expense scandals which nobody else has ever seen, then it might be relevant.  Since you seem to have kept to the more general topic of expense scandals, in general, just as I stayed with literal translations, in general, what you said there is just fine.   