加拿大夫妇增产报国连生两个小孩 竟被通知因“超生”要缴罚款

你对民主自由的理解太狭隘了！

美国加拿大很多城市都有，主要原因是消防方面的考虑，比如加州： https://findhoalaw.com/occupancy-restrictions/#:~:text=Occupancy%20Formulas&text=Additionally%2C%20the%20California%20Department%20of,in%20a%20two%20bedroom%20unit). Occupancy Formulas The California Health & Safety Code and the Federal Uniform Housing Code both contain provisions that restrict the number of persons residing within a unit by utilizing formulas based upon the square footage of bedroom sizes. Various cities and counties within California have issued their own occupancy standards/formulas. Additionally, the California Department of Fair Employment and Housing (DFEH) uses what is known as the “two plus one” formula, which permits two (2) people to occupy each bedroom, with one (1) additional person in the living spaces (i.e., five (5) people may reside in a two bedroom unit). The DFEH formula has not gained formal legal status at either the state or federal level. 当然还有生活质量方面的考虑。