Rollon you ask whether other jobs come under criticism when things go wrong. I can think of many nurses and doctors (as mentioned above) but also bankers, lawyers, bureaucrats, police, and politicians, not to mention home-makers....
To get back on topic: my mother, aunt, grandmother and greataunts were all teachers, so I have great respect for the profession. I myself teach in a primary school with a large percentage of immigrant and/or economically poor children (as a volunteer working with small groups, not as a full-time member of staff) so I have some direct experience.
The question in this thread is whether the government is right to set base level targets of competency by the end of primary school and to hold school heads accountable for these targets. Clearly, there are very strong political biases among many posters, some even seeing a political conspiracy to impose central control on schools. As an outsider, with no allegiance to any British political party, I tend to look at all political issues here more objectively and so find some of the reactions to the Education Minister's comments perplexing.
I might be naive, but I assume it is implicit that "all children" must achieve certain targets excludes from the Head's accountability children who are not mentally competent to achieve those targets just as if the Secretary had said "all children" should have thirty minutes to run around outside during the school day, I assume it would be implicit that children who are physically incapable of running around would be excluded from the target. To focus on the "all" rather than on the underlying objective is, I think, unfair not to the Secretary but to all children who could benefit from having cleary defined targets.
To me, it seems obvious that attainment of a certain level of education should imply attainment of certain skills. Countless national and international studies point to a decline in attainment of basic skills in this country, a fact I think is likely to be attributable in part to well-meaning efforts (such as seem to be advocated by many posters on this thread) to avoid setting clear targets and holding Heads and teachers accountable for attaining them.
We do children a huge dis-service by letting political beliefs, suspicions and/or cynicsm get in the way of setting high standards for primary education (and beyond).