The lack of investment dollars for new business ventures has long been an issue in Wisconsin. It has become even more pressing in a state that has lost jobs for the past five straight months while the nation as a whole has been adding them. Legislators from both sides of the political aisle are now pushing for some kind of taxpayer-backed venture capital fund that would invest in promising young companies in fields such as biotechnology, pharmaceuticals or medical equipment. The hope is those investment dollars will help firms flourish, hire more employees, grow the tax base and improve the overall economic climate.