How do we know that?
Duncan did not say there will be zero forms to fill out, zero punishment for comitting perjury nor that there will be zero employees monitoring his proposed consumption tax.
He did not say those things.
The article did not say those things.
The bill has 30co-sponosrs (all republicans)
and its summary (written by the CRS) reads in part
This bill imposes a national sales tax on the use or consumption in the United States of taxable property or services in lieu of the current income taxes, payroll taxes, and estate and gift taxes. The rate of the sales tax will be 23% in 2023, with adjustments to the rate in subsequent years. There are exemptions from the tax for used and intangible property; for property or services purchased for business, export, or investment purposes; and for state government functions. . . .
the bill terminates the national sales tax if the Sixteenth Amendment to the Constitution (authorizing an income tax) is not repealed within seven years after the enactment of this bill.
Each referring to the proposal years (decades??) ago
Heritage calls switching to a sales/consumption tax a “win.”
Freedom Socialist Party calls it “maybe worst idea ever.”
CATO, which does not weigh-in on individual bills has supported the idea for years
https://www.cato.org/policy-analysis/emancipating-america-income-tax-how-national-sales-tax-would-work
https://www.cato.org/speeches/economic-civil-liberties-case-national-sales-tax