"According to research by economist David Macdonald of the Canadian Centre for Policy Alternatives, they (capital gains and dividend treatment,) also benefit well-off people far more than the middle class or low-income people."

That's because only those with money pay taxes!  The top 1% of tax payers paid 21.6% of all income taxes paid in 2013.  The bottom 50% of taxpayers collectively paid only 4%.  Which group is not pulling their weight?

Jr. can only gouge those with incomes for so long before there is a serious backlash at the polling booth.  Of course, he can always count on those who profit from other people's work to continue to vote for a party that promises to confiscate their wealth and spend it on themselves.  It just depends on where the pendulum swings and right now the system of raping those with money has swung too far!