it's very expensive to be waited on hand-and-foot by qualified medical professionals, and to be given various drug treatments, food, and bed space. Health care is not cheap no matter how you cut it, and the government can't change that. All the government can do is mandate that everyone pay for everybody's health care through a tax. If the majority doesn't want to pay enormous health-care premiums, then the only thing we can do is guarantee basic care to sick individuals. Expensive treatments cannot be given to everyone for a variety of reasons, so they're expensive.
Having said that, i hope your mother feels better. My dad is getting close to that age, and i (nor my brothers) am not in any position to support him. Luckily he, like your mother, has given himself a green cushion.