The article sort of addresses the foreign investor issue:
China’s Town
By Ben Schreckinger | Boston Magazine | October 2014
http://www.bostonmagazine.com/news/a...estate-boston/
This seems like an overblown issue. Many of these foreign investors buy these properties to rent them out. So it is simply transforming a condo into an apartment. In other cases, the people are legitimate immigrants who are buying property to live in Boston, no different than anyone else buying property in the city. Doesn't seem they should be singled out.
Yeah, there probably are a few people who hold on to them simply as a place to crash when they are in town. But, I doubt there are that many people and most of them would stick to NYC, London, Paris. And at the end of the day, that is really more of a function of demand, not supply. Better to have them underwrite the construction of new luxury towers (and the relating tax dollars) vs. bidding up the prices on the existing low rise housing stock in central Boston.
If pied-a-terres are really a problem in Boston, it seems the solution is to impose a special tax on them, rather than blame new construction (which is helping to ameliorate the "harm" anyways).