The Confiscation Acts themselves did not do much but laid the legal and social groundwork for the Emancipation Proclamation which would come in the following year.
Lincoln was able to capitalize on the reaction to the Confiscation Act to feel comfortable enough to push forward the Emancipation Proclamation, which applied to all slaves in rebel held territory.
I believe the answer is: Market Economy
In the market economy, the type and price of a certain product would be completely driven by the the amount of supply and demand in the market. People in market economy had the right to choose the type of job or goods that they want to produce and tend to be benefited by inventing a new products that well liked by the market.
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