The intent is to rectify miscarriages of justice. The founding fathers were a bit naive in some respects. They understood that consolidating power into one man's hands was dangerous, hence the separation of powers, but over the last couple of decades, more and more power has been gathered under the executive. The flaw in this, of course, is that someone unscrupulous will misuse it. I think they only counted on ordinary corruption like war profiteering as in the Grant administration. They didn't really foresee someone quite as awful as Trump and assumed that the norms of the office would be some protection. Those norms aren't protection against someone who doesn't know what the norms are and could not care less about observing them.
I doubt it will happen, but I'm hoping that more people who are incarcerated under marijuana laws will be pardoned. I believe that Obama commuted some of these sentences before he left office, but didn't offer full pardons. It's the height of hypocrisy for the government to pay its bills off the proceeds of marijuana, while jailing people who sell it.
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