I will try to explain.
Where I am coming from is within the laws of supply and demand, microeconomic theories, and also what is known as World Dependency Theory. To understand medicare, you have to understand the law of supply and demand, and you have to understand subsidies. Subsidies change the market equilibrium. Examine the graph:
Subsidies are known as a negative tax, or money that the government provides to the public or corporations to balance externalities. Subsidies change the equilibrium price. The rectangle in the graph is the effect the subsidy has on the normal market equilibrium of supply and demand. The original equilibrium point is e1, where the lines S and D intersect. The subsidy provides money to the public. This means that, say $500 is provided for a $600 procedure. What the public used to pay $600 for, they now pay $100 for, and the subsidy pays the rest. This shifts the supply curve right, and changes the equilibrium point to e2. Consumers' demand is at e2, more quantity for less price, but in reality the real price that is being paid is point b. This is how a subsidy works.
Subsidies are issued by governments to encourage a positive externality like healthcare, but they can run into many problems. These problems I have already expressed. Problems like lowering the quality of healthcare, taking advantage of the system for theft, giving too many unneccesary procedures, jacking up the price of healthcare, and consumers not taking care of their health because healthcare has become cheaper. This is all rather complex, and understanding microeconomics takes a minute of meditation.
For every pro there is a con, the system is not so simple, it is a paradox. Money does comes from somewhere, instead of nowhere. The EU is not America. Communism and slavery are at stake. There is more to think of here than just throwing out free healthcare. Take a look at these links to further understand.
Beggs, Jodi. (2025, April, 29).
Understanding subsidy benefit, cost, and market effect. ThoughtCo.
Scott, G., & Kvilhaug, S. (2024, February, 28).
Subsidies: Definition, how they work, pros and cons. Investopedia.