Homeschooled children do not vote, so I don't see your point on that front. The parents of homeschooled children are voters and many quite active in grassroots.
Just attend a local schoolboard meeting and suggest that the local bars have a homework help section in their establishments since that's where their parents are, in order to raise test scores. You'll see just where the "effort dooming" bunch resides.
Most families are disinterested in their children in my experiences. They want hands-off parenting, managed by the state. People are so quick to blame the public schools, but this is a case of the parents getting exactly what they asked for, and professional educrats being opportunists preying on unfit parents to feather their nests.
It's the parents, not the schools, and not the teachers.