The Michigan State and Wisconsin situations are entirely different.
Wisconsin is whiffing on the greatest in-state recruiting surge in Wisconsin in... possibly ever, simply because Bono is a turdbiscuit and Askren doesn't like him because he is a turdbiscuit. Also saying they have a situation similar to Northwestern is wrong, as well. They lost one guy. Might be the biggest returning points scorer, but it is still one guy - not three. State losing two is much more similar to Northwestern.
I don't see it happening to Rutgers. Goodale has a great atmosphere going on there and the fan interest is as high there as any institution in the country, bar none. As far as Purdue? Ersland keeps bringing in recruits, not outsourcing them... that could change though, I suppose.