Oh yes, job-seekers (formerly unemployment), carers, disability, attendance, bereavement, child benefit and so on...up to about fifty*
There's no denying that it could be simplified. Like many systems in this great nation, benefits have proliferated and grown as did the proverbial African American child in the story by Mrs. Beecher Stowe.
However, the jump from many to one is plain ridiculous.
*that may be an exaggeration