Contracts given to connections of the governers or the wider academy chains however are not
It depends what you mean by "connections of the governors". In broad terms, the Charities Act defines "connected persons" to mean family, relatives or business partners of a trustee, as well as businesses in which a trustee has an interest through ownership or influence. Any transactions with a connected person would attract the interest of the auditors and, if overpriced or awarded incorrectly, would be reported.
If you mean contracts awarded to friends of a governor, that, of course, goes on in all types of school. It would still draw comment from auditors if it was clearly overpriced.
Over half were using their chains to push religious influence on the curriculum - creationism for example - in schools which are supposedly state secular
Since most of the chains are not religious, I do not believe this claim is correct. In any event, teaching of creationism as fact was banned years ago.
Many of the chains are the fiefdoms of wealthy businessme, patrons of political parties
Simply not true. A charity cannot be owned or controlled by anybody. Most of the chains are not associated with wealthy businessmen or patrons of political parties. Harris Federation was, of course, set up and is still sponsored by Lord Harris who has also given money to other schools and colleges. So yes, Harris Federation is associated with a wealthy businessman but it is not his fiefdom.
There are numerous way to slice money and benefits out of large budget organisations, none of which particularly attract attention in themselves
Which, of course, happens in local authority controlled schools as well.
There is far less oversight of academy chains than LEA schools
In what way? An academy chain is subject to independent audit, oversight from the Charity Commission and oversight from the ESFA. I would, however, support Ofsted's request that they should be able to conduct full inspections of MATs rather than the summary inspections currently used.
they are much more able and willing to game the results tables by excluding many children with difficulties or additional needs, who then go to other neighbouring schools
The latest statistics on exclusions suggest that this charge, often levelled at academies, is the reverse of the truth. The exclusion rate for academies is identical to that for other types of schools. However, the statistics suggest that pupils with SEN are less likely to be excluded from academies than from other types of school. Of course, there will be some academies that have high exclusion rates for SEN children.
The changes over the past decade have forced many schools into becoming reluctant academies (or lose a large chunk of their budget in a recession)
No school was threatened with loss of budget to force academy conversion. Before funding arrangements changed academies received slightly more funding than other types of school to cover the additional costs academies face through having to do things themselves that are dealt with by the LA for other schools.
increased the rate of academies being consumed by chains, with political or religious agendas
I don't know of any academy chains with political agendas.