I am looking for papers which discuss, if making the block rewards dependent on the difficulty could be used to curb excessive PoW growth.
Idea is that BTC price roughly drives difficulty and energy consumption proportionaly. If the block rewards would decrease with difficulty (like in
reward=(a+b/difficulty) with suitable constant values for
b) then it would become much faster unprofitable to add more hash power, thus curbing the growth of total hash power and energy consumption.
This must have been discussed somewhere before, but I can not find anything related.