Marx spent the first chapter of the Communist Manifesto fanboying over how capitalism was increasing the productivity of labour to previously unthinkable levels [1].
He explicitly argued that this was what he believed would make communism possible.
So whatever else one thinks about Marx it's clear he did not think in terms of a fixed ratio.
The comparison of Lenin and Marx is also flawed - Marx argued for the dismantling of the state, not a highly centralised state.
In Critique of the Gotha Programme he even pointed to the US as a better model for education (arguing that government-set standards but devolution of control over the actual provision of education was something to aim for) than the SPDs proposed state run education because he disapproved of giving the state control over even that, arguing that it was rather the state which needed to be educated by the public.
And in his work on the Paris Commune he lamented that one of the biggest errors he believed the commune made was to not go further and smash the rest of the state. The focus on centralised planning in the Soviet Union was Stalinist, not even Leninist, and certainly has nothing to do with Marx.
[1] E.g.: "The bourgeoisie, during its rule of scarce one hundred years, has created more massive and more colossal productive forces than have all preceding generations together. Subjection of Nature’s forces to man, machinery, application of chemistry to industry and agriculture, steam-navigation, railways, electric telegraphs, clearing of whole continents for cultivation, canalisation of rivers, whole populations conjured out of the ground — what earlier century had even a presentiment that such productive forces slumbered in the lap of social labour?"