bankster - someone who took risks on the markets. Lost. Expects others to pay for his mistakes. Preferably tax-payers. So he can continue his lavish life-style. Embraces socialism for himself, and capitalism for everybody else.

banker - someone who took risks on the markets. Lost. Took the hit. Takes responsibility for his actions. Doesn't believe that there will be the end of the world if he goes bankrupt. Understand and embraces free market capitalism with both sides of it: risk and reward.