I am at the moment playing France and yes they are a bit slow
however they must have the money to do it so you have to lower their
taxes to almost nothing and your tariffs to reasonable levels, then you can check if their personal money increases then you just have to wait.
One more thing I am pretty certain that you must have a lassiez faire
party in power, they do not do anything if you have statecapitalism in power. You must also promote some clerks to capitalists though it is
expensive, the more you have the better.