Economist are some of the few people that could justify cheap labor with a straight face. They believe in incentives and disincentives, and not to forget the notion that humans are rational human beings that choice the best of what they are offered.
Did you ever hear Attenborough's statement at the beginning of RSA videos?
“Anyone who believes in indefinite growth on a physically finite planet is either mad, or an economist.”
Well yea that hit the nail on the head

The could be the reason why Republicans are hell bent on claiming that they're in the process of "enlarging" the pie, instead of dividing the pie into equal pieces. They would rather try to create new wealth to help the poor (which takes more resources, time, and effort) than adequately use the wealth that already exists in the system. They excuses to always accumulate and amass disproportionate wealth never dies. I would have probably came out an evil human being had I went into economics in depth.
At the end of the day, you can't make something out of nothing. We've been doing it for a while, but it will all come down crashing. The housing market crashed, because housing prices were going up very high, but salaries were not, the results was the housing crisis which lead to more of the economic recession. We've been trying to make something out of nothing, and sooner or later it will backfire and collapse on itself.
Republicans idea is that if they tax less, people and businesses will use that money saved from taxes for investments which will create more jobs, more people will go to work, get off benefits and pay taxes It works if businesses really do put that money into that kind of activity and create jobs. However in recent times, companies haven't been doing that, and if they have it's been putting jobs in other countries. Case in point Apple.