The business has to charge more in order to pay the newly increased wages that are necessary in order to hire the wealthier people who now desire to live in the improved neighbourhood.

I don't think they're afraid of "the neighbourhood getting nicer". I think they're afraid of people who don't know the local situation "helping" them out - "for their own good" of course. It is the same problems that countries face who work with the IMF/World Bank. Who wouldn't want free money?