Assalamu alaikum, I would just like to make one thing clear. Sometimes with regards to responsibilities, even though it is not a shari'l legal obligation, not doing it could still be sinful.
For example a woman does not have shari' legal obligation to cook even if the husband asks. However if the the woman does not do it (after the husband asks, without a valid excuse) then she will be sinful even though the government cannot oblige her to cook.
Same way if someone does not keep a promise then he will be sinful but the government cannot oblige him to carry out the promise.