I think the job description changes a little bit.

After all medicare and medicaid are the two most efficient plans in the country, and there are far fewer cases of them aggressively trying to deny care.

For profit insurance is part of the reason costs are out of control. Taking 23% profits, introducing a huge amount of overhead with high level management salaries and benefits, and saying that there will be savings to the consumer is in general quite laughable. There can be other benefits such as diversity of options and varying levels of quality (pay for premium care etc.), but to say that private industry lowers costs is generally erroneous.