Liquid democracy channels a great deal of human energy into civic decision-making, on a volunteer (unpaid) basis. This human civic energy is mostly untapped today, used only for commentary most of the time. Bringing it to bear on important matters unlocks a new resource at essentially no cost.
One great strength of a global democracy is its ability to raise revenue on a global basis, because the sovereign borders that enable tax havens are eliminated. At least $21 trillion currently hidden in such places will come newly within reach of taxation, both to fund government operations and programs such as education, and for redistribution to reduce inequality.
Taxes can be structured in various ways, some of them socially beneficial, such as a tax on carbon emissions (to mitigate climate change), and a tax on securities trades (to discourage excess financial speculation).
One key resource that must be funded is the distributed computational power to support all the voting on a blockchain. This will be incentivized through a “mining” system, as with Bitcoin and Ethereum today, supported as necessary by tax revenues.
Vast resources are saved by eliminating nearly all military forces, which will no longer be needed once our global democracy phases in and countries phase out.