In most countries, there are a ton of legal protections and mandated benefits for workers. In the US, unemployment, workers comp, and social security stand out

In most countries, there are a ton of legal protections and mandated benefits for workers. In the US, unemployment, workers comp, and social security stand out as the big ones. Beyond just tax, it's important that the government knows where you work so that you can effectively file complaints or for benefits of you happen to be working for an abusive employer, get laid off, or want to get paid during retirement