this is a follow up to my question
Error "An unsupported security policy assertion was detected" when processing a WSDL with Svcutil.exe.
It seems that I'll get no further feedback on this, so I'll go with the assumption that it's not possible to use Svcutil.exe to generate functional client code from the WSDLs of the there mentioned services.
The main problem seems to be the security policies which are completely ignored, so no meanigful binding gets generated.
Therefore I guess I've to manually set up a (custom) binding to produce requests the conform to what the services expecting.
Here's an example for a service requests, it uses an SCT (issued by the corresponding STS) for authentication: