I think possibly what the conspiracists are referring to is the change in Govt policy re adoptions. The Govt has instituted targets for adoption, allocated funds which financially hard pressed LAs can draw down on if they meet those targets, and are exerting pressure to increase adoption.
I can see that LAs will be putting pressure on SWs to meet adoption targets. An unscrupulous SW might be tempted to take a baby into care that they think would be easily adopted in order to meet their target, when they know that the likelihood of older children already in care (the vast majority of DCs in care) being adopted is low.
This IS NOT hard evidence. But it does show that the changes in adoption policies of the last decade or so could set up a system that means an unintentional consequence could be that children who might left with parents for assessment previously are now taken into care and then adopted, in order to meet targets and gain access to extra funds.
The pressure and speed of adoption is likely to increase mistakes happening.
www.gov.uk/government/news/more-children-adopted-than-ever-before
Edward Timpson, Children and Families Minister, said:
“It is hugely encouraging that the number of children adopted from care has risen to the highest level yet ....
“... we have made the £150 million Adoption Reform Grant available for local authorities to spend on recruitment reform, and this summer I gave voluntary adoption agencies a further £16 million to expand and recruit more adoptive parents. I hope to see this funding deliver results."