From the original article: "According to the Department for Education (DfE), which oversees Teachers’ Pensions, death register entries may be matched to scheme members even if personal details differ. The DfE told the Guardian that once a possible match has been identified, the beneficiary may be asked to confirm that they are not the same deceased stranger every 12 months since the system, administered by Capita, does not log a disproved link."
The problem is with the approach in attempting to reduce fraud.
Once a false positive from an incomplete match from the death register is proven false - when the pension recipient tells you they are still alive - you don't need to check up on that same incomplete match every 12 months, because you already know it's false.
Demanding "a solution of some form" completely misunderstands the problem and is the same approach that gave us the Post Office scandal.