This is quizzical. Most cities spend more money per pupil than suburbs and rural areas; which suggests that poor education in urban areas is a function of institutional corruption and not lack of funding.
It also has to do with lack of support at home. Suburban households are more likely to make sure their kids do their homework, come to parent teacher conferences, and discipline their kids when they do wrong.
Poorer families lack the resources and time to make that happen. My sister has taught at 3 such schools over 10 years and lack of parental support for education is the norm.
I think you might mean "This is questionable". Quizzical is an adjective applied to people's expressions or behavior, implying that they are puzzled, confused, or questioning. It is not an appropriate word for suggesting that an argument is dubious.
[Assume a standard grammar Nazi mea culpa here, if language corrections are annoying to you.]
[Assume a standard grammar allied powers mea culpa here, if language corrections are annoying to you.]
> thæm
I suspect the so-called Allied powers are trying to instigate a war, but we will not be provoked.
> i read gp as using quizzical as a verb
That reading of gp's intent, while plausible, still involves an in-apt usage of the word. At best, you might say "This makes me quizzical", but that would still be an awkward way to express your doubts about the validity of the argument.