whose idea was it for you to go there

[navi tasan]

Tom says: I went and talked to the manager.

Roy says:
1) Whose idea was it for you to go and talk to the manager?
2) Whose idea was it to go and talk to the manager?

Are both #1 and #2 acceptable in this context?
The context does make it clear that the agent of 'to go and talk to the manager' is Tom. Is the 'for you' necessary?

 

[Tarheel]

I suppose you could use either one. I guess you know it's not really a question. It's an expression of disapproval much as "Who had that bright idea?" Is saying that it was not in fact a bright idea but a stupid one.

 

[emsr2d2]

Whilst I agree that it can be an expression of disapproval, that's not necessarily the case. It could be a completely genuine enquiry. The tone of voice would dictate which one was meant.

 

[5jj]

Are both #1 and #2 acceptable in this context?

Yes.

The context does make it clear that the agent of 'to go and talk to the manager' is Tom. Is the 'for you' necessary?

No.