Nothing is impossible...
...for those who never have to do things for themselves.
In this particular case, I would recommend first installing an in-sewer-ants scheme against hare-brained schemes.
Einstein famously postulated that a problem which can not be suitably described can not be solved. Let us apply this gem to the above.
What is the problem ? Certain services are deemed so critical to the functioning of society that a large scale failure of said services wil cause untold damage to society.
So HOW exactly will in-sewer-ants protect society against -say- a catastrophic failure of the water supply or electricity grid, for example by terrorist attack ? My guess...not whatsoever. Utility companies may (or may not, if their in-sewer-ants is anything like the ones over here) receive a large chunk of change after a claim, but this money will most certainly not be paid out immediateley, the insurers will go to great lengths to weasel out of coughing up, and all the while the great unwashed masses will still not have their electricity or water supply restored. Receiving a great deal of money will not make new HT masts appear magically.
I would understand mandating critical systems be insulated from non-critical sysems, e.g. nuclear power plants not being attached in any shape or form to commercial backbones. AFAIK this may already be the case. Or water companies be mandeted to invest in a minimum backup water capacity which can be rolled out in a hurry. But money after a disaster ? Not really.