1. Thats not what a 51% attack is and doesnt let you do that. do research.
2.bitcon isnt centralized, pools are false centralization. ie. if someone pulls some shady stuff, the people 'get out of the water' and they lose the hashrate and peoples faith in them, pool owner then loses their income stream. any other form of centralization is just as much BS. do research.
3.no it doesnt... do research...
1. I have done my research. Do yours
2. I wasn't talking about pools. I was talking about mining cartels and ASIC manufacturers. Or in the future, just banks. If bitcoin is accepted I can see many governments spending a lot of money to make massive mining centers to ensure they control the currency. They can then treat it like they do regular banking today.
3. If this was the case we would have prunning already