If you ask those people still living in Spore you'll find that it's
NOT about freedom but rather lack of them. Some have elder parents to look after, some don't know how to get out, most don't have the $$ to think of leaving,.. Even those who are doing well are buying overseas property. They will leave at their own leisure.
I know many ex-Sporeans who do return to Spore on holidays. Each time they've returned they see more of the old Spore they know demolished & changed. Once their elder relatives pass away they have little reason to return. As for the younger relatives they are looking at how they can leave