In a traditional Proof of Work (PoW) scheme it’s assumed it takes some amount of time to compute the PoW function, such as SHA256x2 in Bitcoin and the difficulty increases as the network is capable of mining faster than the target 10 minutes.
In many Proof of Stake (PoS) schemes other metrics are used to determine if a miner was “selected” to have stake in the block, usually by looking at bits of TX inputs.
What keeps a PoS miner from having essentially infinite TX input hashes available on hand at any moment and mining blocks at a fast rate to inflate the currency / collect lots of subsidy rewards?
