What would make them unfettered? A useless opposition? That should be rectified.
#Stopbrexit #Savedemocracy....... Anyone see the problem there?
The only problem I see is your non-sequitur.
What would make them unfettered is the utter dominance of the Tory party and the politics of the right in the dense populations of the South of England. Hence a workable majority and no prospect of the Tories losing power anytime soon. Combine this with no regulation from the EU protecting worker's (and human) rights then the prospect of reduced worker's rights being eroded is highly probable.
The dominance of the politics of the right in the UK, especially Southern England, mean that an opposition which is not "useless" is required to drift pretty far to the right (or the centre in right leaning England) to get elected. This is highly unpalatable to me and to my country in general where our political centre ground would be to the left of England's. This will likely lead to the collapse of the Union and further emotional, political and economic carnage.
The Tories will win the next election. The democracy of this is not the issue but I am weary and tired of existing under Governments that I am ideologically opposed to. The EU offer a level of protection from worst excesses of the Tory party, who continue to drift to the right in general (although I do believe, if he has any actual principles left, that Johnson is, at least socially to the left of the Tory party) and the prospect of being subjected to the whims of venture capitalist, welfare state dismantling Empire nostalgists is terrifying.