During all eras, scarcity implies that resources must be taken from some in order to go to others, if new products and new methods of production are to raise living standards.
It is hard to know how industry in general could have gotten the millions of workers that they added during the twentieth century, whose output contributed to dramatically rising standards of living for the public at large, without the much-lamented decline in the number of farms and farm workers that took place during that same century. Few individuals or businesses are going to want to give up what they have been used to doing, especially if they have been successful at it, for the greater good of society as a whole. But, in one way or another -- under any economic or political system -- they are going to have to be forced to relinquish resources and change what they themselves are doing, if rising standards of living are to be achieved and sustained.
The financial pressures of the free market are just one of the ways in which this can be done. Kings or commissars could instead simply order individuals and enterprises to change from doing A to doing B. No doubt other ways of shifting resources from one producer to another are possible, with varying degrees of effectiveness and efficiency. What is crucial, however, is that it must be done. Put differently, the fact that some people, regions, or industries are being "left behind" or are not getting their "fair share" of the general prosperity is not necessarily a problem with a political solution, as abundant as such proposed solutions may be, especially during election years.
However more pleasant and uncomplicated life might be if all sectors of the economy grew simultaneously at the same lockstep pace, that has never been the reality in any changing economy. When and where new technologies and new methods of organizing or financing production will appear cannot be predicted. To know what the new discoveries were going to be would be to make the discoveries before the discoveries were made. It is a contradiction in terms.
~ Thomas Sowell