IQP in the QGD Exchange

I've heard that Korchnoi favored playing the exchange french an IQP position.

It seems like this approach should translate reasonably well to the queen's gambit declined.  The following position seems no worse than anything that comes up in the QGD Tarrasch, and the computer claims it's about equal.  It goes without saying that black must be willing to accept the weak d pawn, but I'd take that over the mainline minority attack variation any day.  Strangely, I've never seen these lines in any of the opening theory research that I've done.  Is that because authors assume that black would have played the Tarrasch if he wanted an IQP, or am I overly optimistic about Black's chances here?  Any strong players have thoughts on this?

Just to clarify: did Korchnoi play c5 against the QGD exchange?  I am aware of that line in the French.

Thanks for the feedback.  I'm not sure how it's possible to reach anything akin to the Semi-Tarrasch, as it is no longer possible to achieve the structure found in either the e3 or e4 lines.  Are there concrete reasons why these lines are inferior to the Tarrasch and the aforementioned line in the French?  If anything, it looks better than the Tarrasch because white hasn't fianchettoed his bishop in order to exert pressure on the d pawn.  It also does not expose black to the dangers of Tarrasch gambit (I used to play these lines, and I do not believe them to be sound).

This structure looks different from regular IQP. i assume pawn on c2 instead of e3 makes a big difference.