"Oh, that's not a useful system, because there are limits."
"Well, when you get near those limits the bank starts to work with you so those are still not roadblocks."
"Oh, well that's just because they prefer the rich to the poor."
No, you miss the point. At lower amounts, it's a non-issue because you're not hitting limits. At the point where you are hitting limits, it's facilitated to smooth those things. End result is that there should be few issues, regardless of amounts.