Is this even viable? Due to the non-linearity of block rewards -- reward as a function of time spent working on a block is not constant -- an individual miner

Is this even viable? Due to the non-linearity of block rewards -- reward as a function of time spent working on a block is not constant -- an individual miner is always incentivized to pool hop after a certain point [1]. [1] http://www.cs.huji.ac.il/~yoadlew/bitcoin.pdf http://www.cs.huji.ac.il/~yoadlew/bitcoin.pdf