Capitalism is an economic system that allows private ownership of the means of production. The opposite of capitalism is Socialism or Communism. The definition of Socialism as people use the term these days seems pretty fluid, but technically Socialism means that the means of production is "socially" owned. In reality, this means the government owns or controls the means of production. In reality this means that your right to own and produce property and engage in commerce is removed or diminished.
A free market simply means that people are free to make choices. Almost all forms of government interference in the market takes away free choices. The one area I agree with government interference is to protect people's health and safety, as I see the government's role to prevent people from harming one another.
For about a hundred years we have been losing freedom in this country by way of slow incrementalism that few people have noticed. We have reached a point where ideas and candidates that would have previously considered unfathomable are now being seriously considered.
Prior to the election of the current president, the extreme left had been content with making slow gradual changes. With the election of this president they have become emboldened. They think that we have reached the ten yard line and can go for a touchdown. However, America is not so crazy to elect someone like Bernie Sanders.
In short, we can't afford it. We can't afford the government we have now. We are headed toward bankruptcy and will go the way of Greece if we don't do something. We can't even make Social Security solvent.