Do you believe that a system ensuring everyone's basic needs met would stifle motivation and innovation, or enhance it?

Stifle. If lazy sluggards who spend their life glued to TikTok, fattening themselves on Pringles and Coca-Cola from the air-conditioned comfort of their reclusive home, are paid just as much as honourable half-decent people who work hard and contribute to society, what motivation is there to pursue the latter course, and what is to prevent people from falling into the former? Absolutely nothing, we may with full confidence answer.