Because some settlers figured out they shared in the goods and food whether they worked or not. Those who worked got tired of carrying the slackers and their production slowed. Both settlements faced starvation. Socialism fails because everyone is different, not motivated equally. Why on earth would anyone but a slacker accept a socialistic government, a government that doesn't recognize this fatal flaw in people and ultimately must employ some form of force, by the leaders who don't think much of individuals anyway, which works so well it's used on everyone, except the affluent who run the system.