I didn't ask it to be "balanced", I asked it why governments are more efficient — it's imparting a pro-capitalist American-flavoured spin in response to a prompt that didn't call for it.
You really detracted from your point and killed any hope for a nuanced discussion by begging the question. You could have simply asked the model which system is more efficient.
These models are trained to be truthful. Your disagreement isn't with the model, or the US, or the capitalist world but with economics and social sciences.
If you want Claude to list arguments for socialism, be explicit about that ("List the best arguments in favor socialism). It will gladly comply. You didn't do that, you asked it to assume a premise that runs contrary to the current state of expert knowledge.
If you ask "why should I drink this poison?" or "why should I fire my gun randomly into this crowd?" should it refuse to push back? A leading question in no way implies it should follow your lead.