Which survey error source is larger: measurement or nonresponse?

As a survey methodologist I get paid to develop survey methods that generaly minimize survey errors, and advise people on how to field surveys in a specific setting. A question that has been bugging me for a long time is what survey error we should worry about most. The Total Survey Error (TSE) framework is very helpful for thinking which type of survey error may impact survey estimates But which error source is generally larger?