Because the voters are stupid.
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Voters are greedy. They have been taught that one should vote primarily in one’s self-interest. After all America is the country of the “individual”. People unfortunately learned a long time ago that they can vote to increase their income through various government programs, tax credits, and policies. We -here on FR like to repeat the phrase “We’re a Republic not a Democracy”, but virtually every law, Amendment, and Supreme Court decision in the last 100 years has broadened the franchise AND corresponding feeling of entitlement. What we are witnessing in slow motion is how representative government may eventually die. The Founding Fathers anticipated it, and some were openly worried about the citizenry’s ability to keep it.
BTTT!