Labour for me is human productive effort towards achieving set target.To answer the question, labour may be wealth, in the sense that when others labour while you fold your harms and watch from where will the wealth come from?
Tho we mainly define labour as humanly efforts in something in achieving a particular goal but then looking at the brighter side of everything labour can be wealth as well, in so many ways. But a better description of how labour is wealth cannot be overemphasized but having put in so much into a job, with time it produce results and that results is what determines your wealth that's how i see it.