Really tired, I don't think the problem is with schools being obsessed by data so much as it is with schools being determined not to look at the evidence of how other, more successful schools, teach phonics. Often this is because they have a prejudice against phonics, and in favour of the unsupported whole word/multicueing methods they were taught about in their training. Education academics have been distorting the evidence that supports phonics teaching for years.
Gutrotwein, there is no reason why any child shouldn't be able to pass the phonics screening check if they are well-taught, unless they have very serious SEN. Given the improved results in reading comprehension as measured at Key Stage 1 SATs since phonics was introduced, particularly for children with SEN, it is highly irresponsible of schools not to ensure that they are teaching phonics well.