Political autonomy is fine, but remember this is not going to be like colonization on Earth where an ordinary citizen could actually just buy passage on a boat to America themselves. Getting the "chosen few" to Mars is going to require that ordinary taxpayers, who will never get to go themselves, make sacrifices. Is it worth it? Well I personally think it is, but that's up to the voters. However for the colonists to then turn around and say "screw you, suckers" is unreasonable.