Great apples-and-oranges comparison, Mr. Milke. However, by asking whether income groups *as a whole* are paying "their fair share", you're missing the point.
What you should be asking is whether it's fair that certain of your target upper income earners should be able to get away with a much smaller tax bill, simply because they were able to (and chose to) incorporate and take advantage of the various opportunities to reduce tax that are currently perfectly legal. No, it's not fair that some of us should be able to sprinkle income among dependants not actually working for us, or defer paying tax on investments for decades by keeping them within our private corp, just so that they can reduce their taxes.