In addition, for every problem that we solve--global distribution, connectivity, transportation--we create even more. All of these "solutions" require additional infrastructure, research and development, and ultimately, breed entirely new disciplines and fields of study--i.e. STAFF. Additional flexibility breeds complexity.
100 years ago, I probably wouldn't have ventured very far from where I was born. Food would be grown locally. I wouldn't have internet, etc. Today I have MUCH more flexibility, but that comes at the price of complexity. I tend to believe the SUV / iPhone argument but think they're pretty terrible examples. All things equal, I could likely maintain the same level of technology and lifestyle as someone 100 years ago on about half my income. It's simply, not our culture, which is in large part driven by consumerism. Even if I WANTED to, most companies wouldn't allow it.
The real question we should be asking ourselves, is do we need the iPhone / SUVs, etc. And if not, why are we working so hard for them?
The film Happiness [1] also explores the work / leisure balance in depth.