John Edwards, UK Information Commissioner, said: "Capita failed in its duty to protect the data entrusted to it by millions of people. The scale of this breach and its impact could have been prevented had sufficient security measures been in place.
I'm willing to bet that the vast majority of these people didn't willingly entrust their data to Crapita at all, and that this was done so either without their explicit knowledge, or in the small print that nobody reads of their agreement with whoever it was they actually "entrusted" their data to. I also strongly suspect there was no real choice given to people about whether they explicitly gave that trust or not, if these are things like pension schemes, where your option is "pay in, or don't".