This is controlled by the Racial trait "Creative" and has nothing to do with ideology.
the Bene Epiphany simply gives them significantly higher research rate... does not change the chance of making a breakthrough.
I'm confused by this response because when (in Crusades) I promote a scientist and pay 20 promethion and 2 arnor spice I automatically get an "Epiphany", a whole tech even if it would otherwise have taken very many turns of research (eg: Massive Scale Construction).
Previously, this was restricted to Benevolent empires and there's an alternative less good one for Malevolent which I've just checked: "Coerced Invention" costing one scientist + 10 promethion +1 helios ore and yielding " a massive one time research boost - scientist retires" - but not the whole tech.
In this iteration the Epiphany has become available to all which I imagine is just a slip. but I wanted to check that Stardock haven't rebalanced (which I think would be a misstep).