Institutional theory about consultancies

I don't know if it exists, but if it doesn't it should, and if it does it isn't widely applied. I am talking of course - well ok not "of course", not even slightly - about the institutional theory of consultancies.

A repeated problem with consultancies reported by users and in formal reports is that their advice seems to reflect whatever will please whoever is paying them. It is sometimes not in the interests of their paymasters, and often not in the interest of the recipient of the advice if they differ from the commissioner.

So some theoretical designs which separate the consultants from the paymasters - for example, that consultants work on a rotational basis, so only receive payment from one organisation once - would help to improve the general performance of consultants. Other design improvements are no doubt feasible.