It's not about about so much who paid for it, but who knew the truth about it and what the dossier was used for. 

Remember this dossier was used for 
1 - the basis of the FISA warrants to wire tap Trump and his team
2 - the basis of the investigation on Trump and Russia collusion
3 - the basis of the media lynch mob on this fake news story about Trump and Russia

Then understand who was privy to the information. Clinton, Podesta, DNC, Wassermanshulz, Rice, Clapper, Huma, Lynch...Comey! and even Obama!

Now, go back and watch " all the presidents men" and think to yourself...hmmmmmm hmmmm which is worse and which is more criminal?