I disagree that it's convoluted. Only because of the extreme push that we've heard from one side in the media does it seem foreign. You're intelligent. You can understand the concept of relativity.
There's a difference in something BEING the same (two people with $2000 bills, one a prince and the other a pauper)...and something FEELING the same ($200 for the pauper and $20,000 for the prince).
Explained in a less touchy-feely way...it can be described at the net effect. The net effect on all citizens should be the same. Take my example above: two people with $2000 bills, one a prince and the other a pauper - the same CAUSE has a DIFFERENT effect on the two. Whereas with $200 for the pauper and $20,000 for the prince, the EFFECT
Being a citizen shouldn't be harder on one citizen than on another. Otherwise we've turned into a "**** you, it's your own fault you're poor" society. There's got to be some middle ground between everyone fend for themselves and a nanny state. There just has to be.
The problem with that argument, in my opinion, is that taxation takes a percentage of income, not a fixed amount, from everyone. So if the tax rate were 20%, the prince making 100,000 would pay $20,000 and the pauper making $1,000 would be taxed $200. Richer people will pay higher numerical amounts under a flat tax. The percentage of income, however, will be the same.
It is also important to think about
expenses. The expenses of the prince who may own a business and hire workers will be far higher than the expenses of the pauper. His money is not hiding under a mattress. Much of the money is also invested, allowing production to expand, thus lowering prices and helping the
poor. Giving the poor money from government decreases the amount of resources available to grow the economy. The poor will likely not invest the money, but spend it on consumer goods. This will result in a focus on a consumer economy, rather than an economy where investments are made in capital to promote long term growth.
Another thing to think about is how much the prince gives back to society. Say the prince hires many workers, and although he makes a large income his actual profits after paying the costs of production are only slightly higher than the pauper. If he were taxed at a higher rate, the "burden" would be higher on him than the pauper, and he may even have to lay off workers.
It is not as simple as rich people have a lighter burden and poor have a heavy burden, so we have to equalize burdens. Every individual seeks to lessen his or her burden. If in doing so the burden is replaced by taxation, it creates a very hopeless and absurd situation in which people are never allowed to reap the benefits of being successful.