There are two sets of costs to be borne by the majority in support of the unwise:
1) the cost of Flood Re, which starts up in April 2016 and will burden all householders with insurance in order to provide subsidised insurance to the unwise. That is what I was referring to and precisely what modeller asked in his question.
2) the cost of erecting bigger flood defences, which is what JtH, baldric and Kathryn have latched onto because it is today's news. That gets picked up in bigger council tax bills in affected areas.
The quickest amongst you will have realised the double whammy on those who chose their house carefully, just above the flood plain and above the torrent level of recently-flooded rivers - you're going to be paying twice - once on the insurance premium, once on the CT.
Here's a quote from what Flood Re says about the first of these costs:
Q: I am at low flood risk, so why should I have to pay the levy on my home insurance so that someone at higher flood risk can get affordable flood insurance?
A:The Flood Re levy is a new charge on insurers based on market share. Insurers will now be eligible to cede selected properties to Flood Re, but will continue to decide on the overall premium charged to individual customers as usual. Better information is now available that shows many people are potentially at flood risk from flash flooding, for instance, and not just people living near a river or the sea. Having property insurance that includes flood cover is usually crucial in getting a mortgage. So if flood insurance was to become harder to obtain and more expensive, this could have serious repercussions for the whole property market.
Insurers will remain responsible for pricing and will decide how best to pass on the benefits of lower premiums and excesses charged by Flood Re to customers.