This is just one groups proposal.  And their proposal calls for a substantial tax increase to include a capital gains tax & a state income tax.  For many of us that's a non-starter.
So again this is a group that claims to be non-partisan but by the make-up of their board of directors and their proposal to grow government and taxes, it more closely mirrors only one side of the discussion.
Government needs to prioritize.  The legislature has already added more money to education since 2014 than this information you shared called for.  So it would seem that what some of these groups want are new taxes, not just additional tax monies.