Immoral people will be selected against and will thus have a more difficult time surviving, but they cannot be totally eliminated (like the flu virus).
I agree that bad people use big government to leech off society. What I don't agree with is that eliminating "the government" is necessarily going to make those people unsuccessful.
Most all ppl think murder is immoral. Some ppl think eating animals is immoral. So, who you consider ‘those people’ & who some1 else considers ‘those people’ will be different.