system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can the government force you to purchase a healthcare plan or get fined?

I'm still confused as to why or how this is constitutional.
gpt
Because the 16th amendment to the Constitution of the US says that the Federal government has the authority to impose taxes. These taxes can be for just about anything. The Supreme Court decided that imposing taxes for not purchasing health insurance is constitutional.