Companies are having no trouble at all finding the cash to boost their stocks of machinery, equipment, and software. No trouble at all. And they are not scared of "uncertainty"--whether about future taxes, future health-care costs, or even future demand. Perhaps it would be better to say that healthy profits (because wages are flat on their back) and low interest rates (if you have collateral) offset whatever fear of low future demand is doing to discourage investment in equipment and software.
Business confidence is not abnormally low, and is not in more-than-normal need of a boost.
What is still profoundly in the dumps is residential construction investment. The housing market needs to be fixed. Not "business confidence" as a whole.