Thomas Sowell has written a fine piece on the pitfalls of leftist ideas of confiscation and redistribution:
Those who talk glibly about redistribution often act as if people are just inert objects that can be placed here and there, like pieces on a chess board, to carry out some grand design. But if human beings have their own responses to government policies, then we cannot blithely assume that government policies will have the effect intended.Excellent. Read the whole thing here.
The history of the 20th century is full of examples of countries that set out to redistribute wealth and ended up redistributing poverty. The communist nations were a classic example, but by no means the only example.