Um, how about real conspiracies? No need to make something up. A few examples:

1. Trump colluding with billionaires to take over the USA.
2. Tech companies’ proxy mass surveillance for the NSA.
3. Billionaires keeping the USA from having infrastructure other countries have had for decades or even centuries.
4. The erosion of private property due to market incentives.

Real conspiracies are seldom bombastic or spectacular.