Hyperspace Beacon: Easy money in SWTOR

Players have complained about Star Wars: The Old Republic's Legacy system's being a huge money sink. Why would I want to blow 275,000 credits to gain 30% extra XP? I'm not sure that the return is worth the investment unless you want to level multiple alts or level strictly through PvP, but I can understand BioWare's thinking regarding this sink. True, at the guild summit, we were told that the vast majority of level 50s have less than 500,000 credits in the bank, but I think you will agree that the money sink is needed when you see just how quickly money can be earned in SWTOR.