The law, described by its supporters as a national model, requires all residents of the state to have health insurance. It includes a tax penalty for people who don't buy insurance
http://abcnews.go.com/Health/PollVault/story?id=1834807

A little discussed fact about health care in the USA is that
poor people are already receiving health care.
My opinion is that the politicians view "the uninsured"
not as needy people to be helped, but as a source
of additional funding, by forcing them to buy insurance.

It's no secret that big insurance companies favor this
approach, as does every demographic group
polled, with middle class and wealthy looking at the
uninsured as scofflaws who are receiving free care
and not paying their share of the costs.