If someone doesn't't want a job? If someone can't work?
The "why" is most important. What are you trying to measure and does your definition help?
The numbers are not juggled. Either someone meets the definition or not.
If you don't like the definition, what's your's and why?
Keep in mind that the Labor Force Participation Rate went steadily up until 2000, and down since then. And think: the participation rate is higher than any time before 1978. If you use the participation rate as your standard, you're saying our job situation is better than all the 50's and 60's.