The purpose of this chapter is to make the criminal justice system accountable to the public by developing a system for the sentencing of felony offenders which structures, but does not eliminate, discretionary decisions affecting sentences, and to:
(1) Ensure that the punishment for a criminal offense is proportionate to the seriousness of the offense and the offender's criminal history;
(2) Promote respect for the law by providing punishment which is just;
(3) Be commensurate with the punishment imposed on others committing similar offenses;
(4) Protect the public;
(5) Offer the offender an opportunity to improve himself or herself;
(6) Make frugal use of the state's and local governments' resources; and
(7) Reduce the risk of reoffending by offenders in the community.