Since most middle class families only average 1.3 children, personal deductons are minimal. As far as qualifying for the minimum $7000.00 (Thanks to the Democrats) in total exemptions before a family can itemize, most middle class families are forced to elect standard deductions.
(refer back to the first sentence)The net income retained is quickly used up by increased realestate taxes, automobile, sales taxes, utilities,etc...all of which are not or only partly deductable. The middle class takes the lions share of the burden. It's a simple fact. Ask any accountant.
I don't know a single family that has .3 kids. I sometimes wonder about my oldest son though. As for your other examples, EVERY class pays the same amount of sales tax, homeowners bear the brunt of property taxes and renters are shut out of the mortgage deduction benefit. Now we can talk about non-federal income taxes if you want BUT, that was the basis of my comment so I was not wrong. The simple fact is that the middle-class family has it pretty darned good and the average middle-class individual is a consumer of one or more of the federal government programs I listed above.