how do you propose the Bitcoin miners get paid over the long run on the MC when the block rewards have been diminished and all the tx's are occurring on the SC's?
Miners will continue mining both chains. The much larger transactions not requiring privacy and/or instant confirmation will be taking place on the more secure mainchain. Miners will be paid from processing transactions on every chain working in synergy.
over the long run they will have to as block rewards diminish and all tx's are occurring on SC's
Stop using hyperboles, no not all of the transactions will occur on the sidechains. Moreover, no they will not have to choose between the two. They can continue mining both. I really fail to see your argument here.
if they were neutral, they wouldn't be insisting on a change in the source code which uniquely benefits their for profit business model.
Insisting? I have read a proposition but have not seen sign of insistence. Their business model is innovation on top of the sidechain "protocol". They have no incentive to compete with Bitcoin since by all account they are planning to leverage it. Bitcoin is vital to their business model.