Also we aren't just talking about slack jawed idiots here. If Bitcoin survives and grows the "Bitcoin wealthy" would include major corporations, millionaires, billionaires, sovereign wealth funds, hedge funds, ETFs, family wealth funds, etc and they ALL would have their wealth devalued by raising the cap. It is a pretty easy and transparent choice.
If a government puts pressure on you you could loose all your wealth. Governments have various ways of putting pressure on you. They can cut you off from the banking system, attack your physical infrastructure, send some uniformed thugs your way etc. The more money at stake the easier it is to pressure you. So go along or you loose all your coins.
If it happens then Bitcoin is dead anyways. Still it is pretty easy to hedge your bets. Sell off your inflat-a-coins, keep your bitcoin and buy assets this the procedes. If you guess wrong and the old fork dies you can always buy the new coins back with the proceeds.
What about Grisham's law? Bad money drives out good.