From Longman Dictionary of Contemporary Englishwho needs it/them?who needs it/them?spoken a) used to say you are not interested in something Make-up, who needs it? b) used to say that someone or something is actually very important to you Kids? Who needs them! → need
Examples from the Corpus
who needs it/them?• If make-up is not wearable, who needs it?• Men, she thought; who needs them?• Underwood and Carling's tissue types will be stored on computer until they can be matched up with somebody who needs them.• Emergency care would be covered for everyone who needs it, as required by law now. 