She thinks for a while.

"The fact that the man is naked, can mean that he is deprived from many things, or, that he is watched over so much, that he feels naked in front of those who have power.

Usually, when one climbs higher, it would symbolise liberty and freedom. It reminds me of the first image you showed us Professor. If you combine both images, perhaps they could mean that as much as a slave can thrive and work harder, and as much as he can try to climb, he will never be able to achieve anything better for his position in such a society?"