Stop being a child. What Nokia did is perfectly legal, and the insanity of the german labour system (with workers councils that have ultimate approval rights for absolutely everything) is a total disincentive for any company to employ significant amount of staff in the country.
If the contract ran out in 2006, then the company has had ever since that time - complete right to decide what to do with its operations. I am surprised they did not move sooner.
I also think you are grossly exaggerating the effect of any boycott campaign in Germany, which will no doubt dry up in a week or two, after the politicians have had their fieldday in the press.
Nokia, as any company, is constantly trying to drive their production costs down, especially as the demand for low- and midcost phones is growing. One part of this is to look for locations with the cheap labourcosts for production tasks.
With regards to the subsidies, I would assume (depending on how long the contract period was), that Nokia paid considerably more back to the Germany society through taxes, social fees and salaries to the employees. It was a lucrative, although not a permanent, arrangement for Bochum.