Miners do not give a shit about the moral implications of charging taxes.
They just mine where there's money to be made. That is decided by the amount of economic activity in the network (tx fees) and the size of the economy it covers (value of each coin). What network do you think it is most profitable to keep secure?
Most of the people in this world most of the time do things for reasons other than making money. Do not underestimate ideology, emotions, sex drive, fear, jealousy, love, ignorance, curiosity, stupidity, spitefulness, and yes, moral implications. Any analysis based on the assumption that people always choose the best deal based solely on money is out of touch with reality.