Just generally, this model doesn't apply to the UK. There is an extremely long history of people voting one way and the government doing something else. This is because the country is led by people whose views are shared by no-one, and the tremendous power of the Civil Service (elected officials have limited powers to direct civil servants and cannot remove all but a handful of civil servants...there was an example recently of a senior civil servant giving incorrect information to a minister, the minister was forced to resign, that senior civil servant stayed in for several years, another minister attempted to remove them, the civil servant sued and won a substantial settlement then chose to retire early on a full pension...he was responsible for several massive issues in his department too, Windrush was one, there were many others).
A more nefarious factor is that turnout has collapsed because voters, correctly, understand that their vote doesn't actually matter. The government is unable to do things so why bother voting. Turnout is significantly higher in Russia presidential elections.
To give you an example, the current level of immigration is supported by ~3% of the population. No-one supports this. The government knows no-one supports this. Immigration has stayed high for multiple years, we have had elections, it doesn't matter. If we elected someone to fix it, they would be unable to fix it. Labour have tried to fix it...they spent years in opposition saying the Tories couldn't fix it with their policies...they get into government, within a year they are now trying the exact same policies...because Parliament has no real control, whether in theory or in reality, to change anything, the government gets in, the civil service present the same choices that won't work...you have to be actually mad to think voting makes a difference. The idea that you can fix things by voting is the reason why things are stagnating.
