The link explains (briefly, with further links for more details) the structure and functioning of a DDI. The money to fund government would be created. The amount provided for government would be equal to the current per capita amount of total government spending in the country multiplied by the size of the population of the country. So for each year it would be strictly limited.

I presume that all of the money would go first to the central government; whatever was not spent there would be apportioned among (in the U.S.) the states, based on population, with the same process used there to apportion money to local governments. Government at all levels would presumably still have the power to levy taxes and sell bonds — if ‘the people’ allowed it.