It was a semi serious point. Yes child abuse was a hidden crime up till the 1970/80s and people of all classes and backgrounds were involved. Social norms were different then and stuff which is now seen as a serious crime was more often dismissed as creepy, bad form and something people got beaten up over but not jailed. Maybe Leon Brittan was even complicit, I dont know. but all of those things are a totally different situation to pretending the was an officially sanctioned conspiracy to use the secret services and non existent draconian secrecy laws to hush things up.