If an organization had such power, then it could create a transaction from any other entity to themselves and this transaction would have a large chance of being accepted, as this entity has majority control of the acceptance mechanism.
What makes blockchains secure? (1/5)
Tarun Chitra

That is not at all the case. Any node (not just a miner) would reject a block that had unsigned transactions in it. So even a 100% miner could not make transactions from other people to themselves.