I don't see how improving our real estate data equates to low quality or corrupt politicians.

The downside of implementing a new tax is that it may have unexpected consequences. Many companies, pro sports, education, entertainment people are given residency on a temporary basis for employment. It would make it difficult for this firms and institutions to attract people if they had to pay a tax.

Secondly, we don't know if this is the real cause of the housing bubble. 

Besides who really wants a new tax?

I applaud the government for trying to get some facts before acting (for a change).