What does the government do to protect competition in a free-market system?

What does the government do to protect competition in a free-market system, why does the government need to take these actions.?

They are supposed to keep monopolies from forming. Also taxes and regulations should be evenly applied.

In a free market the government doesn't do anything to protect or to hinder competition. Once the government is involved, regulating the market for whatever purpose, even to protect competition, you no longer have a free market, instead you have a managed economy.

not much, because big business controls government

look at the FDA and the pharmaceutical companies.

They are one and the same

that is just one example