Lets remember that based on Adjusted Gross income in 2009 the "top 50%" had an income floor at $32,396 Top 25% was $66,193.
And remember AGI is after your deductions and children and spouse and whatever else.
With that in mind what is the poverty level? $20,000 AGI? 15? or do we define it by saying the bottom 20% of incomes and have it float?
I think at some point we need to define these things instead of using vague terms like "the poor" I do not feel the entire bottom 50% of incomes is the poor but some people seem to.
I guess my point is if we define a term either with a percentile or an AGI we can get passed these arguments. Blanket statements about needing to expand the tax base or about the bottom 50% all being poor and needing to not pay taxes are just opposing sides talking past each other.