Monster: “Working class”: just an expression. Substitute the phrase, “lower-middle class”, if you prefer.
Here’s the argument in greater detail, though.
Say there are 3 tax brackets, 15%, 30% and 40%.
In my example, you pay no tax on your first $10,000 of income.
You pay 15% on your next $20,000 of income (up to $30,000 in total, right?)
You pay 30% on your next $40,000 of income (up to $70,000).
And you pay 40% on income above that (in reality, the tax is 38.6% on every dollar earned beyond $307,000, for single filers. Ignoring deductions).
OK, now let’s say you drop the bottom tax rate to 10%. (From 15%).
Somebody who earns $20,000 per year will get a tax cut of
5% times $10,000 (or (.15 - .1)*(20,000 - 10000)) = $500.
Somebody earning $50,000 will benefit from the tax reduction over the full tax bracket span of $10,000 - $30,000. He will get a tax cut of $1000. ($20,000*.05).
Similarly, the upper middle class tax payer earning $100,000 will receive a tax cut of $1000 - larger than that received by Mr. 20,000- even though Mr. UpperMiddle did not have his own tax rate adjusted.
Now Scylla will point out that Mr. $20,000 receives a percentage tax cut of 2.5% (500/20000), while Mr. Middle receives 2% (1000/20000) and Mr. UpperMiddle receives a paltry 1%: (1000/100000). Poor Mr. UpperMiddle! Mr. $20,000 is clearly the lucky ducky!
I would say that Mr. $20,000 needs the extra $500 more than Mr. UpperMiddle needs the extra $500, never mind the extra $1000. But that simply reflects (in all honesty) a blatantly liberal perspective.
Conservatives don’t see things that way. They note that the fat cats pay the big bills, transferring money that is rightfully theirs to big government. Or something like that. Big Gov is not entitled to the extra dough anyway, so it’s no big deal cutting fat cat’s tax bills - he still pays mucho dinero. (BTW: Fat cat is not modelled above, as fat-cat by my reckoning earns at least a cool 300 thou).
What’s weird is that Scylla seems to argue for marginal utility declining with income: you need to give Trump an extra mansion too make him feel great, while merely handing a used Miata and paid parking space to flowbark would make his day. This leads to an argument for redistributing income: why not give 200 people Miatas and have The Donald give up one of his Penthouses?
At bottom, I think that a conservative approach to taxation has to dispense with classical utilitarianism and go with some sort of rights-based approach.
At any rate, the above shows that cutting the bottom tax rate will benefit the upper middle class more than the lower-middle class, in absolute dollar terms. Nonetheless, Republicans typically insist upon cutting every tax bracket, magnifying the (absolute) benefits for upper incomes.