"Free market" refers to a currency system and financial system, usually established and managed by the state, which allows the value of goods and services to be set by supply and demand. Unions use strikes to negotiate with management. Not the same thing.

Not everyone shares that definition of a free market, but fair enough.

Actually that's the commonly used definition of free market in economics.

You might be confusing it with laissez faire, which isn't necessarily a free market.