I don't think that's true? I think that, in practice, people value themselves more. But I think that it's a fairly common tenet of normal peoples' moralities that people are equal in value, and that if you asked random people, most of them would not say that they consider themselves to be more valuable or important than everyone else.
Which, yes, means that there's a discrepancy between what people say they believe and what their actions say they believe, but that's pretty normal too.
Most people don't analyze things much at all. It's possible to ask a random person and be told he values everyone equally, and that's in some literal sense not saying what he believes. But if you just rephrased the question as "do you care more about yourself than someone else--would you pay my mortgage as readily as your own", he would answer "oh, if that's what you mean, then of course I care about myself more". Technically he's inconsistent, but it's a very shallow sort of inconsistency based mostly on the fact that he doesn't analyze things much; it isn't some kind of hypocrisy or denial.
I'd like to hear from people about a process they use to decide how much to give to charity. Personally, I have very high income, and while we donate significant money in absolute terms, in relative terms the amount is <1% of our post-tax income. It seems to me that it's too little, but I have no moral intuition as to what the right amount is.
I have a good intuition on how to allocate the money, so that's not a problem.
Background: I have a wife and two kids, one with significant health issues (i.e. medical bills - possibly for life), most money we spend goes to private school tuition x 2, the above mentioned medical bills, mortgage, and miscellaneous life expenses. And we max out retirement savings.
If you have some sort of quantitative system where you figure out how much to spend on charity, please share. If you just use vague feelings, and you think there can be no reasonable quantitative system, please tell me that as well.
Update: as suggested in the comments, I'll make it more explicit: please also share how you determine how much to give.