How does the US increase wealth amongst the middle class without discouraging job creation and investment?
By decreasing the wealth of the rich, which is discouraging job creation and investment.
The exponential increase in consumer demand giving $1 to the middle class and poor compared to $1 to a rich person who has all his needs met would more than make up any "discouraged job creation." 1000 poor people buy 1000 times as much crap as 1 rich person worth all of them.
The discouragement of investment idea is a fraudulent concept. A false dilemma. Any multimillionaire and up who thinks he's got a goldmine of a business proposal on his desk will take out credit lines and assemble partners. Policies designed as an "encouragement of investment" is an encouragement of bad investments.
And if there's anything that discourages investment more, it's lack of consumer base which is what is happening right now.