If the schools can't hire enough bus drivers then they simply have to pay more money or not offer busing. The schools don't have tons of money just sitting around, so the next step is more taxes.
I've got a family member that actually does that. She drives the school bus in the mornings and evenings, and works in the cafeteria during the day.
In a world where communities are experimenting with Universal Basic Income (UBI - which I also think is a sorely broken concept) to redistribute excess wealth to citizens just for breathing, I don't understand how the next step towards funding actual work that we need accomplished is to increase taxes.
The existing funding just needs to be channeled better to the right places. So, I think the next step is actually electing/highering better managers of school funding.
I agree our spending is out of whack, but the programs I'd like to see cut for funding bus drivers are the same ones the folks demanding we cut taxes insist we must keep bathing in money, not the ones aimed at helping people get out of poverty. So given no one is willing to give up their preferred programs, raising taxes seems like the only option if we want to keep transporting kids to school.