I'd take away currency. Paper money, coins, and definitely banks. I'd abolish every form of the stuff. Money has corrupted trade and commerce beyond reason. It's turned the world's people into drones of the system, enslaved to the wealthy by it's control over everything. It continues to feed heinous corporate machines that in turn feed the dirty campaigns of self-interested governments, which now seek to ban one of the few good things that money has brought about: the free trade and exchange of information and knowledge via the internet. The money is controlled by the government, which is controlled by the money in a cycle that leaves the people out of the loop. The only people who have enough money to truly influence government (voting is only an effective form of democracy in very small scales; it's something the bureaucracy uses to fool people into thinking they're free and in control of their own fate) are the wealthy, and far too often, they use that influence to further bolster their wealth rather than to stand up for the interests of the people.
Unfortunately, far too many feel that our technologically modern world would not be possible without money, corporations, and massive governments. I'd argue that anything a corporation is capable of, a skilled and determined individual or small group of individuals is capable of implementing far better, just on a smaller scale. Look at the auto industry. The best cars in the world are made by the smallest auto companies. As another example, Wikipedia's website is run by fewer people than this convention is. Standardization and macroproduction (ultimately both byproducts of money) enables streamlining and production efficiency, but discourages innovation and progress. As individuals, we are designed to think and create freely and pursue the path in life that calls to us. Put 10,000 people in a megacorporation and try to make them all move towards a joint goal, and there's no creative momentum because there's no joint motivation; every force in that conglomeration of creative potential is pushing and pulling against others, and ever person's unique ability to contribute is lost in the vastness. Without money, the glue that holds these corporations together - social prisons of the modern man - is gone, and the creative potential of the individuals trapped within can run free and DO SOMETHING.
I'm of the belief that the meaning of life is to be, to create, and to appreciate that which is, was, and will be. Money has become a thick and restricting cover which holds us back from finding meaning in life; people trudge through their dreary lives each day just so they can secure the money they need in order to continue their dreary, joyless lives, then they make babies so their babies can make money and have their own dreary lives. It's an endless cycle of boring, unfulfilling, adventure-free existence.
