We can start with the supposed benefits of our military and its 1, 000 plus bases throughout the world. Were we to take the yearly cost of bases and divide it among families in the US we could give each family $5, 000 a year. A first year Economics student in High School can answer which would provide the greatest economic benefit to society.
The idea that increasing taxes on tax payers earning over $250, 000 a year reduces employment as a large portion of that group is small business owners. I have worked in, managed and consulted for small to medium sized businesses my entire career and have never been in a conversation where taxes affected hiring decisions.
It is always easy to generate a sturdy or poll that indicates that small business owners would potentially hire more employees if they paid less taxes. The reality is that in order for that business to be successful, grow and meet customer demand it has to staff accordingly.