Well, that's a dumb comment by Cato.
Has the converse of this statement ever been true?
The provincial rich people of Franklin County (and even the outer sprawl of Centerburg and Johnstown) will never send their kids to a school like Tree of Life. They will never send their kid to a school that focuses on Jesus more than academics.
I don't think you've got any justification behind this. At best, you're simply splitting people into two categories to make a tautology, that "rich people who don't send their kids to Jesus-y schools, don't send their kids to Jesus-y schools." There are people who are wealthy or have a lot of income, by definition rich in the general sense, who do send their kids to such private parochial schools.
That's actually one thing I wonder about the voucher programs: If every student is given a voucher worth equal value, what incentive do these private programs have to produce ESL and Special Education programs, since these inevitably raise the costs for students?
psst... you want to know a secret... that's the point. Get rid of them ESL immigrants, vaccines cause autism but Jesus can cure ya, etc...