They could do that, but the drugs are still much too expensive comparatively, and it doesn’t include many drugs, especially the ones that are the most absurdly priced.
For instance, after looking through various articles on him and scraping together some of the data, out of the medications referenced as being some that he’s made:
Misoprostol (Abortion Medication) - $14.90 on CPG - $0.89 via MicroLab
Sovaldi (Cures Hepatitis C) - Not available on CPG (normally $84,000) - $70 via MicroLab
Kalydeco (Treats Cystic Fibrosis) - Not available on CPG (Normally ~$500/day) - $10/day via MicroLab
Daraprim (Treats Parasitic Diseases & Some AIDS Patients) - $2443/30 pills on CPG - $80/30 Pills via MicroLab
Epinephrine (Treats Allergic Reactions, AKA epipen) - Not available on CPG (Normally $650-$750) - Initially $30 via MicroLab ($3/reload after)
The pharmaceutical industry is so screwed up, and these prices only show it more clearly.