"Dissolve the organization and start over from scratch" is an under-used solution in American life, even in the private sector. Apparently Camden, NJ did a version of this in 2013 with a fair amount of success: https://www.bloomberg.com/news/articles/2020-06-04/how-camde...
When it comes to code, I thought the consensus was strongly against that because it tends to introduce more problems than it solves.
Also, "Most software at Google gets rewritten every few years." https://arxiv.org/pdf/1702.01715.pdf