[imglorp]

That might be oversimplifying what flat means. Suppose it's not a linear function? Pick your function to begin kicking in above the poverty line and maybe get linear above 200k.

But "no loophole tax" might be a better characterization of the flat idea, yes?

[maxerickson]

It certainly isn't an oversimplification in context. The comment up the thread that raised the idea of a flat tax defined it as "everything is taxed at a single rate".

Maybe single means a complex function? I doubt it.