I had a similar thought a few years ago that it would have been in the government's interest to buy Pharmasset when they sold for $11B to Gilead based on the future potential of Sovaldi (the infamous $1,000/pill, 12-week treatment for Hepatitis C). The government through Medicare / Medicaid is currently spending upwards of $4B/year on the drug and private insurers and international buyers are spending billions more. It would've been an absolute net-win for humanity had the USGov or someone else just bought the company rather than giving Gilead billions in annual profits.