Democracy is the idea that government receives its power and authority from the general public, not a king, god, or other source. The government utilizes the political authority that we provide them to perform a wide variety of essential services to its taxpayer customers.

We invest our political authority in the government. The political authority is what allows the government to provide and charge for those services. We are investors; shareholders. We are owed a return on our investment.

UBI is the dividend owed to us for our investment.

Those various charitable programs and services you described? Most of those would be replaced by UBI.