It's a call we always hear from those who do not see their favourite political party in power. There tends to be silence from those who "support" the Government of the day, whoever it might be.
Changing the electoral system is nearly always a euphemism for proportion representation, which in turn has not
been seen in a convincing example of such government that I know about. The obvious European example is Italy. Scarcely a model of effective and strong governance.