Sperm Supply Dries Up

According to this piece on the rarely reliable BBC website, The Cardiff Assisted Reproduction Unit (in Wales) has only two regular donors left.

Staff at the clinic have blamed new rules which will allow donors to be identified from next April.

It's interesting, isn't it, that potential donors do not wish to be traceable by their progeny. What is their concern? Future disruptions to their lives by offspring suddenly showing up? Future demands on their personal wealth?
Whatever the reason, we see once again that people respond to incentives, no matter how they perceive those incentives.
I wonder if the Cardiff Unit will raise the price they offer for donations -- isn't that the way supply and demand are supposed to work in unfettered markets?
[thanks to John C for the pointer]