So to sum up:
- The technology for auto-fetching binary packages is there both via PAR and PPM.
- PPM is widely used on Windows, not very much elsewhere.
- PAR is not used much in this fashion in the open.
I will go as far as saying that this is the status quo because there is not a lot of demand for binaries outside Windows. Personally, I think trusting random people with creating binaries for you in a bit of a niche isn't the brightest idea and in this case, entirely not necessary. Chances are, there'll be a foul egg somewhere.
Instead, binary packages should be taken from your friendly OS or language binary vendor. Generally in science, this means from your Linux distribution. Anything else can easily be installed from sources using one of the many CPAN clients that automatically resolve dependencies for you.