It sounds as though some of Soon's communications about testimony were essentially invoices or receipts for deliverables. http://www.nytimes.com/2015/02... Those sorts of business communications probably ought to be open to probing. So, perhaps asking for any drafts of testimony submitted to funders might be appropriate.
Here is the thing that I think ought to be transparent. A donor to a member of congress asks that a particular expert be called to give testimony. That expert prepares testimony and submits a draft to the donor as part of a financial relationship between the donor and the expert. The public should know both that the donor got a favor from the congressperson and that the donor has paid the expert for the testimony. Academic freedom is not contingent upon deceiving the public and probably suffers if that kind of thing is promoted by a misapplication of the principles of academic freedom.
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