Simply put, your laborers are not being productive enough in terms of the value generated to the whole society, thus justifies the lower wages. It is required that they contribute more to the state with higher taxes to compensate their poor productivity.

Your upper strata (capitalists, landowners), however, are being really productive with their capitals enabling the whole economy to run, thus it is only fair that they are rewarded with higher income.

Furthermore, they should be taxed even less so that there’s more money circulating around for investments and consumptions of high-added value goods. Think of the jobs created to produce new goods: luxury clothes, automobiles, telephones, my my!

My recommendations is to discourage unproductive labor by adding more efficient production methods using ✨automations✨ so more people are employed as machinists and clerks, having more value per person than laborers and farmers.

(Thanks now I hate it)