Demand does not the only, or even the most important driver of production and growth. Consumer demand is now satisfied by Chinese production. If you give people money to stimulate demand, you are more likely to benefit Chinese production than U.S. production as you will tax U.S. production to pay people to buy Chinese goods. You need to get away from the consumption/circulation as driver illusion.
Innovation, the process of improvement and invention, creates new products and pricing efficiency that will drive demand (Check out book by Thomas K. McCraw, "Prophet of Innovation").
Lowering the price of a good creates demand and inventing a new good creates demand. Once you are in production, then you care about balancing demand and competition.
We had tires, but when the radial was invented, we discovered we needed new ones. Why did they invent the radial tire; why did they do research and development on better tires? Why did they spend money on this instead of maximizing profit and streamlining tube tire production? Why did they invent tubeless tires? I didn't ask for one, but I got one (The fellow who invented the process used to make the first radial tires, solved the problem of how to get the steel belts into the rubber, is a friend of mine...he didn't do it because there was a letter writing campaign the said, he we want steel belted radial tires!)
Look at Murray's book on UBI, mentioned above, he suggests a $10,000 UBI up to $30,000 income, then phasing out until income reaches $60,000.
Consider that the money has to come from production and that production creates growth and ultimately pays for all government tax and all government debt.
Consider again that real wealth is the risk adjusted discount of a possessory right to an after tax future income stream.
Consider also that it is production and wealth that you will be taxing to money, a UBI, to a segment of the population.
Increased tax on production reduces surplus profits that can be reinvested or increases price reducing the market; in both cases production growth will be slower than otherwise, growth will be slower, tax revenue may be lower even at a higher rate.
Tax on wealth, a tax that reduces the expected after tax return on a future income stream, immediately changes the risk and the discount to present value of that income stream so, even when you threaten higher tax on an income stream you immediately reduce the present value of the present wealth implied by that income (This is why you really can't re-distribute wealth, because the act of distribution destroys it).
So, lets not do these taxes on wealth and production, lets just borrow the money; we can issue treasury bills and have the Fed buy them with new money they create on their balance sheet that never really goes into circulation. Then we can give UBI to everyone and not burden production and everyone can be wealthy. That seems to be the plan. Lets hope the Germans, the Chinese, the Japanese don't then balk at our market treasury debt. If that happens, they might not want to hold our dollars as reserves. If that happens then all the UBI we are handing out won't be worth anything.