In this country, the burden of healthcare is placed on the employer.
In any other industry, paying for the treatment of work-related injuries is the responsibility of the employer. If soldiers were civilians working for a construction company, for example, they would be given health insurance and likely a token amount of life insurance. Companies who refuse to compensate large numbers of employees for work-related injuries are often sued under class action. The same standard should apply to the military.
Finally, it is the moral responsibility of the nation to treat the injured soldiers that fight for our safety, sovereignty, and freedom. Soldiers are asked to make the ultimate commitment, risking life for country; the country should at least commit to treating the injuries that result.