No, it really is unconstitutional for Congress to encroach on the enumerated powers of the executive. Just look at the recent SCOTUS cases around the setup of the Consumer Financial Protection Bureau to understand how consequential this constraint is.
> Just look at the recent SCOTUS cases around the setup of the Consumer Financial Protection Bureau to understand how consequential this constraint is.
Isn't this about the opposite issue, whether Congress can delegate control over funding to the executive? They were trying to get the executive to do the job of Congress and control the CFPB's funding.