Medicare Advantage plans cost Medicare about 12% more than traditional medicare. If the original Medicare got the same funding, it would have only about a 10% deductible instead of the present 20% deductible. Medigap or Medicare Supplemental insurance could cover the rest for about half what it does if the funding was equal.
Original Medicare has no networks. Health Maintenance Networks or HMOs and preferred provider organizations or PPOs all have them. Networks are restricting and dangerous:
You have to choose from lists of doctors and hospitals that are sometimes skimpy. Having to settle for a less desirable doctor can lead to less than optimal results.
Your doctor or hospital could drop out.
You have to be careful with travel.
Every year you have to go over all this for the changes.