Even if they are closed, you can link to the papers (unless the DMCA metastasized again). Granted, someone can't make an automatic tool to find such studies, bu

Even if they are closed, you can link to the papers (unless the DMCA metastasized again). Granted, someone can't make an automatic tool to find such studies, but that would be hard anyway and presumably the authors are aware of the study they are refuting and could tag them. Now, people trying to make policy decisions could not read or evaluate the studies. If we assume they are capable of doing so in the first place( i.e. their not Lamar smith), then we have an actual argument for getting rid of paywalls. I still think the best one is its a waste of money and a tax on universities/ grants.