Why is Switzerland voting to cap its population at 10 million?

Switzerland will vote on Sunday on a proposal to cap the country's population at 10 million by 2050. The population has surged from around 7.3 million in 2002 to 9.1 million, with foreign nationals making up 27% of residents. Supporters of the proposal argue that population growth is straining infrastructure and outpacing Switzerland's ability to expand housing and transport networks.