I don't see how it's a risk more than any other club. The risk is leaving a big club, to go to another big club. You couldn't expect Klopp to leave Dortmund for example.
I still think we can attract top managers, we just can't whistle and expect them to leave another big, succesful club for another.
I think a few of the alledged names turned down an interview due to the short-list and obvious back-lash from their own clubs, I don't think Brendan Rodgers would have turned down the job. Can't blame de Boer either considering he's at a big club, his club, and obviously has a longer term strategy. That's why I'd rather have a long-term, loyal, young manager than Mourinho. If people like that don't come because they wouldn't have £200m to spend, aren't in the champions league and aren't gauranteed to be competing at the top, I don't think they're the right manager for us.