Well Frothblower, you weren't the only one. For a holliday job as students, me and my two friend worked on the site. We were employed by one of the finishing teams on some of the smaller flats, cleaning the tiles on the exterior walls. To get from one flat to the other we had to walk with our equipment from roof to roof across planks, (Health and safety issues were kept in proportion then); well, actually we edged our way across on hands and knees. While we worked cleaning the already clean and sparkling tiles, our foreman sat in his shed reading the paper, smoking and doing other similar important jobs. The three of us worked identical hours and did identical tasks. At the end of the week we all received a different wage. We did not complain, we simply asked why and we were simply given the sack.
We then borrowed my brother-in-laws ladder and tried to clean windows by going door to door in Smallheath. We gave that up after the first day of failure.
Happily we found work at Wimbushes but there wasn't much dough in that job.