How Does the ‘Economic Security’ of PoS Compare to PoW?

Economic security in PoW is tied to the high cost of electricity and hardware required to execute a 51% attack. In PoS, economic security is tied to the value of the staked asset and the threat of slashing.

While both are costly to attack, PoS's cost is more capital-intensive (buying 51% of the stake) and involves a direct, immediate loss (slashing) if caught. PoS proponents argue it offers a more efficient form of security as the capital is locked, not consumed.