The generally accepted definition is 66.333% to 200% of the median household income adjusted for local cost of living.
Because the costs aren't the same so while the NOMINAL income (in terms of number of dollars) might be equal the REAL income (actual purchasing power of that income) isn't.
We're not talking about "life style" here we're talking about the cost of State and Local TAXES, which one might point out would likely result in federal transfer payments and other subsidies to the States and Localities in question if they weren't being paid locally, so it's not like people are getting screwed if they live in a locality with low State and Local taxes, their REAL income still remains on par.
What the GOP is proposing is to tax income that was paid out in taxes which leads one to ask; since when was double taxation a plank in the GOP platform? Since when was it a conservative principle to encourage more money flowing into the central government and less to State and Local governments? I thought conservatives believed in decentralization.
So you're talking between $40,000 and $110,000 in income
Er.. NO... again you're fixated on NOMINAL income, as I said it's adjusted for local cost of living, nominal income is totally meaningless as a measure of comparison between different geographical areas. The only meaningful comparison is REAL income which is purchasing power and that is directly affected by SALT burdens. So somebody making $100,000 a year in say New York city is in fact
much less well off than somebody making $100,000 a year in say Reno, NV.
But you're suggesting that the poor slob in NYC should pay federal taxes on money he forked over to the State and City? Just because he lives and works in NYC? How is that any different than the Democrats that want to punish high income earners just because they're successful?
And yes, lifestyle is a determining factor in federal tax liability, where you live, whether you have children or a mortgage are all lifestyle choices.
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WTF? You're categorizing the state and local tax burden that falls on a wage earner as a "lifestyle choice"? Wow that goes way beyond the tired old class warfare tactics of punishing real incomes for the successful and into a whole new category of punishing real incomes based on geographical location.
... and you still haven't addressed the double taxation question and the centralization of tax dollar flows question, not to mention the raising taxes on middle income wage earners question.