I wonder how it will compare over time, will the overall performance you can get per hour of labour in wages go up or down?

If a high end PC costs twice as much, wages only go up 50%, but high end PCs are twice as powerful. You are still getting more performance for your work. But if performance and wages barely change while costs rise significantly, now performance for labour has actually dropped. Generally more interested in how it compares over longer time frames rather than month to month spikes.