I am hypo-theorizing a network, which:
- Banks have most the CPU power...
- Multiple banks forms an alliance
- "The alliance" is interconnected with each other
- Those outside the alliance don't have access to most-up-to-date blocks generated by the alliance.
A cartel is difficult to maintain in a true market, because the smaller members always have an incentive to cheat.
- Those outside the alliance have delayed (let's say, 10 minutes) access to the chains and blocks from the bank.
The percentage of relative power of the cartel must rise in conjunction with the delay. If the delay were actually ten minutes, the cartel would need at least
twice the computational power of the entire remainder of the network. A 5 minute delay would require at least 50% more than the entire remainder of the network. Even a delay of a few seconds puts the cartel at a disadvantage.
Generating blocks need access to the chains,
And the cartel will need access to the rest of the network as well.
so, delaying the block access make other impossible to generate (useful) blocks.
Incorrect. See above.
In this case, the alliance would almost always have the control.
This is basically what we have in stock market today.
In your presented case, the cartel would be very fragile, even if it could ever even develop the dominance. The network is currently very small, projecting the size of the network when the userbase is ten times larger tells me that the network will become very difficult, indeed.