I think a huge reason for our problematic education system is lack of competition for teaching jobs. If there's a job at a startup that's willing to pay someone for math at $100k (avg in mixed locations) - $300k (avg in silicon valley) how are we ever going to have excellent math teachers. The people competing for a 50k teaching job are not even qualified to have that 100-300k job.
Beyond that the US education system, and the EPA works this way too, is that as we find the numbers don't add up to what we want, we lower the standards until we're at a point we think we can achieve some goal.
If they simply made standards that were wwaaaay higher, they would be forced to realize everything is underfunded.