Where conspiracy is defined as:
an agreement between persons who intend to gain some collective advantage while keeping their agreement secret from the public or from other people affected by it.
The problem is that our hypothetical conspirators are running amok, being video-taped, photographed, documented at every turn... and basically everyone is still shrugging their shoulders and carrying on with their day-to-day lives.
Even though that Youtube video hit 1 billion views, even though CNN dedicated a thirty minute segment proving a common though twisting thread... no one cares.
Sure, there's some initial worry. Maybe enough to warrant one or two investigations. But their "results" are anodyne, or maybe not portrayed as alarming, so 95% of the public-at-large simply starts ignoring the conspirators and their continuing crimes.
Even ideologues and tin-foil-hat-wearers on both ends of the political spectrum are skeptical, oblivious, or are blaming it on other causes.
But why? For what reason would this conspiracy be unthinkable yet widely known, evil yet somehow trifling to the modern citizen?
I'm looking for an answer that isn't predicated on mind control, insanity of those who recognize the conspiracy, virtual realities, technological handwaves, or politically-polarized topics like Climate Change. Those kinds of topics, by definition, means swathes of society assuming conspiracy instead of maintaining indifference.
I don't know what the answer is myself, but, ideally, it will focus less from the exact nature of the conspiracy, and more on our collective capacity for self-deception.