If I were a (benevolent) dictator: Abolish income tax, institute federal sales tax and property tax, institute a UBI that would cover up to the "poverty line" counteracting the regressive nature of the sales tax. Then I would start slashing government programs and increase the UBI to cover it (eg no more WIC or food stamps because you have a UBI). Maybe one day be able to slowly dial down the UBI as the economy rights itself from the last century of government-directed allocation of capital.