“But I will still “judge” and pose the question, “would you consider sharing your wealth?” If you recognize that basic skills and experience are important for school success at the K door then might you choose another less expensive option for your child, but sponsor a less fortunate child to receive some of the same services?”
Can you describe to me the organizing principle behind when it’s ok for a person to spend on a “luxury”, and when that person has a moral obligation to choose a less expensive option and donate the equivalent to charity?
If I pay for a sleep-away soccer camp, do I have a moral obligation to send him to the park district instead and sponsor another child to learn how to play soccer?
If I pay for a private high school, should I send my kid to public high school instead and donate what I would have spent on charity?
If I take the whole family out to an expensive restaurant to celebrate graduation, should I have instead taken them all to McDonald’s and donated the rest to feeding the poor?
If I say I’m going to Europe for a trip, should I instead feel compelled to go down the shore instead and donate what I would have spent to charity?
And for the amusement of the old-timers, just google for what happens if someone makes the mistake of suggesting that they are looking into buying nice watches as 21st birthday gifts 
@abasket, I’m not being challenging here; I’m asking a serious question. What is it about certain things that make people feel “oh, god, that’s just too expensive, they have an obligation to share their wealth, cut it down and donate the rest” when many equal-or-greater-ticket items don’t compel such a response? Because I’ve not seen a single suggestion, for example, that someone who is blessed enough to be full pay at an expensive college should choose another less expensive option and sponsor someone else’s child.
I might also add that at the income bracket you are talking about for the preschool, it’s quite possible that these are folks who are quite generous in their charitable giving (for tax reasons, if nothing else).