Full Disclosure: Worked at one of the money center banks in both Small Business and Credit Cards for six years and a foreign bank with a US presence for 4.
What is this thing and do I need to get my foil hat?
The database they are constructing is being used to conduct performance reviews on originated mortgages. The database won't pick you up unless you start a mortgage. Once you originate the mortgage this database is being put into place in order to monitor your performance on that mortgage and your corresponding financial condition.
Why are they doing this?
To stop the next credit crisis as the system would allow surveillance over mortgages originated by banking institutions. Today, banking regulators have broad powers to request information out of banks including everything that's going to be held in this database (personal information about you, you bet - your bank is pulling regular credit reports on you and the regulator can check your progress when they come in for an exam. Building the database would shortcut that request and help get a better view as to how institutions are originating. No longer would regulators have to show up and start poking around at a bank, but they could monitor the health of the banks portfolio.
Who would be against this? This sounds like a way to crack down on banks.
It is a way to crack down on banks and ensure that what's being originated isn't crap. Think about it. We could have better monitored the health of the entire mortgage system by have having this database in place. Those who are against this are most likely those who have a vested interest in ensuring that the mortgage industry opaque to regulators. Those concerned about privacy should realize all of this data is being collected today, I can pull your credit report and cross it with data from CoreLogic and do roughly the same thing. Yes it is all in one place and with a government entity, but so long as its being used responsibility I don't have a problem with it as it would create an excellent tool for finding bad actors within the mortgage industry.