Yes, the owner does important work, but that work should not give them the right to all the profits produced by the business. Taxes are not a solution to the structural inequality created by private ownership of the means of production, they are a bandaid that alleviates some of the worst consequences. The only way to resolve the structural inequality is for the means of production to be collectively owned by all of the workers who use it, and for business decisions to be made democratically by said workers or by a person elected democratically by the workers (who should themselves be an equal owner of the means of production).