Bad grammar

Political correctness ? I prefer to call it political stupidity. Quote “If a client calls, will they find you?” This is terribly bad grammar! `A client’ is singular case, the rest of the question is plural. Good grammar dictates that the two parts of a sentence must be in the same case, e.g. If a client calls, will he/she/it find you? The only way that the question might be grammatically correct is if the client suffered fro a multi-personality disorder. But then that should be referenced in the text leading up to the question. I blame the current educational system for not teaching correct grammar (and spelling) in the first place.