The Constitution places no such limits on the Presidential pardon power, you can't pick and choose which Constitutional powers you're willing to see exercised and still claim to fully support Constitutional government. Most Presidents are mindful enough of their record to not get carried away with this, although giving the MSM complicity in supporting Obama and his own short-sightedness, there is certainly a potential for abuse.
On the plus side, his lapdog Holder has successfully avoided not only charging any of the Administration members with anything, but also preventing even the investigation of any of them. A pardon has to be from something concrete, at least an indictment or other formal charging instrument, it's not the same as transactional immunity for uncharged and probably unknown misconduct. The problem therefore isn't going to come up if Obama loses this election.
