That is clearly not the point of the original post.
You solve the problems it describes, however, by reforming and above all by properly funding the health and education services, by rebuilding local communities and their instutions, and by treating inequality as a problem rather than an objective.
Nationalising industries, on the other hand, is a response to this and this and this and this and above all this - in other words, to the fact that the status quo is corrupt, parasitic, inefficient, and often deadly, and minor tweaks to the formula are neither going to improve anything nor attract the political support that is required to do so.
I find the logic difficult to get my head around. The government are clearly so clueless as to both enter into a terrible agreement with Carillion in the first place, and then have insufficient nous to manage that relationship at all well BUT if they were in charge of everything, they would somehow magic such nous out of thing air and all would be well?
The government is such a hefty buyer that it has (or should have) the whip hand in any commercial arrangement. When the buyer has so much power in the relationship, then surely some blame for the failure of the agreement has to rest with them?