By the way, the very reason Russia invaded Ukraine is because Ukraine is on a relentless path to successful democratisation, deoligarchization and, yes, reduction, slow or not, of corruption. Russia wouldn't care if Ukraine was to stay _like_ Russia, corrupted and undemocratic. Russians invaded precisely because Ukraine was demonstrating it was (and is!) becoming European, adopting the European standards of the rule of law and a healthy market economy. The last thing Russia wants is a successful democracy at its doorstep, especially in a country that it claims (however falsely) it shares historical heritage with.
¹ https://www.transparency.org/en/press/germany-state-governme...