Clinical trials are in tough shape as an industry, so to speak. It's hard to recuit people, they drop out along the way, they don't follow directions, etc.
Here's an idea.
The drug company agencies should pool resources and produce a PSA campaign on why people should volunteer for drug trials.
Bombard the airwaves and the Internet, showcasing the results, benefits, etc. Make it sexy. For crying out loud, it shouldn't be that difficult.