We don't have unequivocal evidence that the status quo is wrong. It is prudent to take small steps and study the effects carefully after each one. Startups are rewarded for being bold. Countries can't take 80/20 decisions on faith.
Whatever the direction the evidence points to, it's likely massive. The real problem is to sort it out. In this respect, I very much like EFF's proposition to conduct a study about the effects of software patents on the economy. (Personally, I'd do that for the other patents for copyright as well, as well, but narrowing the field has its benefits.)
While the EFF is prudent, I expect a proper study to yield much bolder results, with the evidence to back them up.
