Well, the general economic consensus is that for income taxes, the revenue-maximizing peak of the Laffer curve is around 65-70% [1]. Revenue maximization isn't necessarily the right primary goal, though.

[1] https://en.wikipedia.org/wiki/Laffer_curve#Income_tax_rate_a...

Same back at you. Clearly you think they’re too high. So what is the correct ratio?

The straightforward answer is there is no correct ratio. The best tax regime is the one that allows for sufficient funding of necessary and desired services and long-term economic investment while also balancing wealth creation with wealth inequality. That number isn’t fixed and it’s clear that it shouldn’t be evenly borne by the population as a whole.