Halfway through the 2015-16 fiscal year, state finances are continuing to improve with billions of extra revenue dollars. Ordinarily, that would be good news. However, as the Legislature returns to Sacramento this week after a nearly four-month hiatus, the windfall of taxes — mostly income taxes — looms as a political flashpoint. Democrats want to spend it — mostly on health, welfare and education services — but Gov. Jerry Brown, who will release his initial 2016-17 budget this week, is clearly reluctant.