ANCHORAGE, Alaska (AP) — Gov. Bill Walker’s latest proposal for closing the gap between state revenue and spending is a limited tax on payroll wages and self-employment income. Walker, an independent, is calling the proposal a modified “head tax.” The matter will be addressed at an Oct. 23 special session, the fourth this year, that Walker announced Friday. A crime bill is also on the agenda. The Republican-led Senate earlier this year rejected a House-passed income tax.