[bigfudge]

The EU is built on rules that uphold liberal democratic principles, agreed to by national governments in a flush of post-WW2 clarity, and which tie successors to the same principles. There are exit mechanisms, but they impose large costs (i.e. Brexit).

[modo_mario]

You're saying nothing concrete in particular. What rules? How do they inhibit change? The only thing I can think of which is actually difficult to change is the echr and i see more than a dozen mostly liberal governments queueing up to change it (to little effect so far) over migration issues.

[bigfudge]

There are rules about election conduct and free operation of courts, to give two examples. Both of which Hungary skirts on occasion but the EU does apply some pressure.

[mrec]

The ECHR isn't actually an EU thing. (It's a Council of Europe thing, which is separate from and predates the ECSC/EEC/EU.)