I am repeating a recent point.
There are no moral or ethical problems with undocumented workers buying private insurance or even with people putting money in a savings account.
There is none what-so-ever.
It is actually a net-plus when people from around the world travel to the US for healthcare as these prime customers help us afford a better healthcare infrastructure.
The problems of illegal immigration and health reform arise when one discusses the public option, co-ops, or when people are coerced by government to buy insurance.
Extra-nationals are able to pop in and out of such pools in ways that destabilize the health care for the citizens in the pool.
The difficulty of immigrants and healthcare reform efforts are a strong sign that the reform effort is headed in the wrong direction.