When proportionality constraints are thus satisfied, merely seeking subsidiary goals does not render a scheme a hybrid one. A hybrid departs from the assumed primary guiding principle — in this case, proportionality — to achieve ulterior objectives. This chapter focuses on hybrids of a certain sort: those that permit only a limited degree of departure from the principle of proportionality. If proportionality is an important fairness constraint, then it ordinarily should restrict the pursuit of ulterior ends, such as those of crime prevention. Hybrids that depart from proportionality in restricted situations or to a restricted extent still would qualify as broadly equitable schemes. The chapter shall not be considering models which routinely disregard proportionality, or treat it as only a marginal constraint.
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