Whilst I agree that they should pay their taxes, let's not get confused here: no matter how much the budget is increased, education will not be properly funded because it's not a political priority. Most countries with better education systems don't really invest _that much_ more than the USA, but it's the attitude towards education that counts.
Looking at absolute funding is a bit simplistic in this instance. The problem OP is pointing towards is that some schools are disproportionately bad. In an unequal society where distribution is racially biased, an education system might be superbly funded, while still leaving several district underfunded, yielding the racial bias OP was taking about.
