All four fields are important: eliminating any would be a mistake. So the question becomes, would it be better if psychologists, political scientists and economists practiced sociology? Or should psychologists, economists and sociologists dabble in political science? Also, would it be better for unemployed sociologists to join, say, psychology departments? Or should political scientists enter one of the other departments?
I’d probably eliminate sociology. Many of the statistically oriented ones would do fine in other fields. The rest can become journalists.*