The best laid master plans

We have some really amazing municipal plans in this region. So why do we have such crappy municipal planning?

As part of my job I've been reading the master plans for several of the region's townships and cities (I have the coolest job), and I had to do some double takes when I first ran into talk of sustainability and New Urbanism and multimodal transportation. Was this the same metro Detroit that I live in, where I take my life into my hands every time I ride a bike and have to drive forty minutes to and from work every day? Exurb after exurb after exurb, master plans expressed desires to preserve open space and protect natural features, to work collaboratively with regional governments, and to invest in nonmotorized transportation infrastructure - even occasionally in public transit. A couple weeks of this led me to the original question: if the plans are cool, why does reality still stink?

I'm open to answers. Here's what I've thought of so far: