How Does the Shift from Proof-of-Work to Proof-of-Stake Affect the Power of MEV Actors?

The shift from Proof-of-Work (PoW) to Proof-of-Stake (PoS) fundamentally changed the actors involved in MEV extraction from miners to validators. In PoW, the miner controlled the entire block.

In PoS, the introduction of Proposer-Builder Separation (PBS) aims to separate the power to order transactions (builder) from the power to propose the block (proposer). While the core MEV problem remains, PBS decentralizes the extraction process, making it harder for a single entity to monopolize MEV.