The right wing does not correlate cutting spending with tax cut economics.
On the contrary, I think the right wing would advocate cutting spending so there is no need to tax its citizens excessively.
However, in that, there needs to be uniformity in the tax code, in fact, if I'm not mistaken, the constitution does mention uniformity in tax collection. Whether that is referring to each state paying a uniform amount, or each person paying a uniform amount, I'm not sure.
The point is, we are a nation of freedoms. We can live and work as we please, as long as it is within the confines of our laws. When someone puts themselves in a position to make great sums of money, it is their freedom to be able to keep that money, and not be unfairly penalized for doing so.
Our constitution has no provision for allowing one citizen to be unfairly taxed over another. Morally, the rich should want to help, and in most cases they do, but, it should not be for the government to decide who is rich enough and to seize their money based on the belief that one makes too much money.
That could be a slippery slope. Most people dont think much of it, because it doesnt apply to them, but what happens when it does? What if 20 years from now, then government decides that if you make 100k that that is enough, and any more than that should be taxed at 70%.
What if the government decides that you dont need a 2300 square foot house if you only have 2 children?
If you start allowing the government to dictatae how much is enough money, what's to stop them from applying that same measure to other things?
When does the government get the right to regulate an extravagant lifestyle? It almost sounds as if people are saying "you dont need more than 10 million per year, so the government should have the right to take it". If that's the case, again, I can see a lot of people pulling huge sums of money out of the market, because the market is a risk vs reward venture. If you take awaythat reward, there is no need to take the risk.
I also see companies reducing production, because cost of materials, labor, and utilities wont be warranted if the shareholders are limited in their income. Why would they want to spend the extra money to produce more if their returns will be capped? Shareholders are there to make a return on their investment, if the return isn't there, then the investments will go down.