Thou gossipeth, so shall thou be tolling the land ...

Many have sinned, talked bad about their colleagues (even as they saw that the latter were diligently working) and sought the idle way out.

Then they get saddled with loads of work. That is their retribution.

Then they let the whole world know that theirs is a heavy load, that is, they whine like they did before (using joker as the wild card, so masking their true intentions). They hope that their workload can be lightened so they they can continue in their old ways).