"The prison has always been a failure in penological terms, but it successfully achieves important political effects at a wider social level, which is why it has never been abandoned."
What one can surmise from Foucault's thoughts are that whilst the prison may be a failure within penological terms, with the existence of a penal crisis strengthening the argument, it has actually been a success within the circles of politics.
In order to understand a crisis we need to further look at who this system benefits, it is not enough to simply state that it has been a success in political climbs. However let us start with the purpose of prison, and aptly with the work of Foucault, who carried out vast amounts of research regarding incarceration and subsequently published the well known 'Prisons and punishment' book. Cording to him the reason as to why prisons persist are primarily due the fact that it is rooted in the very fabric of society, and secondly it carries out specific functions to great effect. Effectively what may be deemed failure on an overt level, could be assessed as success on a covert level. The