The US Federal Government was originally funded solely by Excise taxes, which are taxes on products and not income. From 1776 to 1913, with the exception of few years during the US Civil War, the US did not have a federal income tax. The passing of the Federal Reserve Act of 1913 happened the same year the US ratified a federal income tax amendment.
Some sort of group polling of resources to fund goods and services that we all value is necessary, but it may not need to be centralized.
Mini-ICOs may be the future of fundraising for the goods and services that we require. The ICO would have to offer a return on investment in order motivate people to contribute, but this system could potentially replace our current system of taxation.