Personally I don't feel overtaxed but IMO most workers and consumers are paying more tax than they should while very wealthy rich pricks fund politicians to give them tax cuts.
The private sector will never provision sound foreign policy, trade negotiations, military, policing, major infrastructure, fundamental science research etc.
A mixed economy with mostly free markets and some state provision is the ideal. To achieve this you need an involved public who participate in the democratic process- something that becomes difficult over time but something that we can all contribute to.
The wealthy rich pricks like to foster the belief that all politics is corrupt and so make citizens cynical and disengaged- all the better for their crony capitalism. This is what is destroying liberal western democracies as much as anything else.