Government grows because what we do grows. We didn't need legislation on airspace and radio waves and net neutrality and cyber bullying when our Constitution was written. In many cases, powers simply come into existence, and I'd rather the government have those powers than a monopoly or oligopoly of private rich entities.
Rather than limited Government, I'd rather see an Open Government -- one that is accountable to, accessible to, and made up of us. Then why does it matter if government gets big? Government is us, after all. At least we can work toward that. Maybe?