But no, I do not think all crimes should necessarily be punished with prison sentences. Nor does the OP quote suggest that.
Given that Cotton is fighting a bill that would let some some of those people out of prison and just waves away any concern about them being in prison suggests that Cotton is just fine with the amount of people we currently imprison and that he would like to see many more imprisoned.
As expected from liberty-loving, Tea Party Senator.

Now that Rubio is gone, Clinton is their candidate for President.