Earlier quoted context omitted.
I agree. Do you think anyone would contribute?
Yes for two reasons: 1. "Scratching your own itch". There are several hackers / freelancers that want to enroll in healthcare and want that website to work. 2. "Altruism". There are plenty of hackers that want better healthcare for the USA and would gladly help to make that happen. Even if they aren't from the USA.
There are already so many hackers working on open source projects for the government, even healthcare in government, that there would be no shortage of willing helping hands.