Too bad. The government doesn't care about you consenting to things. In fact, making you do things without your consent is literally the entire point of organized government, even if we usually overlook that because it's for a good purpose (for example, taxation to pay for health care or national defense).
I don't care if you think paying for health care or national security is important or not. That's an unrelated issue to whether or not Birthday is private or public data.
If it's true that that information is out in the wild now, then I expect government to tighten their tech security procedures.
How do you think the RNC got birthdays for 200 million Americans in the first place? Public records. 200 million Americans are NOT affiliated with the RNC.
As I replied elsewhere, there is a market for reselling your information on the internet. In some cases that is legal, and in many it's probably not. As a tech person you should know this.