Do we have the freedom to say whatever we want about our leaders? Did slaves? On both fronts the answer is no. They can arrest us if we say something and not even have to sentence us to jail us for however long they feel like. With slaves if they spoke badly about the slave owner they were sold, killed or punished in some other way. Better today? Sure, but not really freedom, is it?
Can we leave whenever we want and can we come whenever we please? Yes? No again. There are many laws on such matters that control coming and going. They can even tax certain people when they leave the country because apparently they didn't pay the government enough.
I'm sure there is much to do before we become exactly like the American slaves of the past, but my point stands that we are closer to be being a slave than being free.