New drugs are there. The pharmecuticals want $$$ $$$ $$$
But it is a dangerous game as we have far gone out of the spectrum of basic penicillian.
I know it's popular to villify the evil pharmecutical companies--I'm not happy with the cost of medicine myself, but it costs somewhere in the area of $1 billion dollars to research, develop and market a new drug. Then the companies have to defend themselves from frivolous lawsuits which cost more millions in legal fees.
Simple economics tells us that, if the company is not going to make any money on the product, they really don't have any incentive to R&D another potentially life-saving drug.