Siegfried explained it, we don't need more food, more roads, more houses, we need a better and enjoyable food, we need better ways to get around, we need better ways to accommodate our selves, and better in the context of the entire ecosystem not just the virtual meme we call an economy
So you (or rather Siegfried) come to decide for people what they need, right?
Easy there. Deisik and Siegfried aren't forcing you at gun point to buy "affordable" health insurance here and pay for your senators childrens college education.
They are simply claiming that they think quality is preferable to quantity in biological systems.
And that is their educated opinion based on observing the world around them.
How come you hate observation and the scientific method bro?
The crucial point here is "they think". Others may think otherwise and give strong reasons supporting their stance at that. Actually, it all depends. But it is not only that. The other part of the problem is that an educated opinion doesn't guarantee you from mistakes. And understanding this is also part of the scientific method man...
In complex systems (and before all in biological systems) such terms as quality and quantity lose their meaning in respect to "quality is preferable to quantity"!