Define what you mean by systemic.
There’s certianly been active paedophiles within the bounds of government and the upper social circle, as there no doubt has within music, television, teaching the caring professions and probably every other professional circle, no doubt some paedophiles are drawn to certain professions due to the access and power it may give them over their victims.
There may even have been cover ups to prevent embarrassment to the government or many other professionals within various fields when someone is discovered to have been involved in this.
It’s certianly concerning that there are gangs/groups involved, but when they do come out it seems to mainly be loose circles of two or three blokes with a ‘shared interest’ and look after each other’s backs, maybe one bloke knows another group and they introduce each other, I can’t imagine it’s the easiest thing to drop into a conversation when looking for new members.
Sickening though all that that might be, it doesn’t follow that there is some secret ‘cabal’ of paedophiles who all know each other and cover each other’s tracks, get police investigations stopped, disappear files and prevent the truth ever coming out as people like JHJ seem to allege. If nothing else because of the risk of bringing attention to yourself.