The technical architecture of Ethereum makes it impossible to prevent a few powerful actors from controlling the entire network.

Proposer-Builder Separation was designed to improve efficiency, but it created an environment where power naturally clusters at the top. Decentralized systems are supposed to resist central control by their very nature. This analysis shows that the specific way the network handles transaction data forces a few dominant builders to take over. Competition cannot survive in this framework because the system's own design favors the most centralized entities. It means the dream of a fully peer-to-peer financial system is being eaten by the very code meant to protect it.