It is literal. To give a measurable example: Imagine that they needed to walk 10 kilometres in 10 hours. They say "that's easy, in the past, we walked 20 kilometres in 5 hours". In the past they walked more kilometres in less time than is required at present. So the meaning is that this situation is easier than previous situations.

We have done more on less means> 1. We worked a lot with a few resources 2. We have worked a lot for a low payment 3. Productive/creative with less money 4.

‘We’re done, more or less’ We’re basically done here…