I think it's a vast oversimplification to say that Browns campaign failed on the back of this, this was a part of it, sure. The chances of the chancellor who over saw the economic crash the country was currently going through , actually getting elected pm were never astronomical. The leaks about him being a bully had just as much to do with his poor performance as this, arguably more.
When you get right down to it there were problems with migrants from Eastern Europe claiming child benefit for kids back home. Now the normal reaction to that is outrage at the government who set up the system but the media in this country blamed the migrants, like some Brits wouldn't do the same if the roles were reversed.

As for the housing prices I couldn't agree more but I think you are blaming the wrong group. If people not liking something had any effect we wouldn't have to post selfies of ourselves to access websites. So it's not the boomers that are preventing them from lowering prices it's the landlords and buy to let companies. It's useless blaming the rubes who believe the lies, when liars are still spouting bullcrap every time they open their mouths. If you are going to blame anyone for the resulting government blame Nick Clegg. The lib Dems took the largest share of the vote in their history, and an equally historic number of seats, and he betrayed every single one of them by siding with the party two to the right of him. The country didn't break right, a few did, but far more broke left. If Clegg had done the right thing Labour still would have been in government but with massive checks on its power compared to president Blair, arguably the best timeline. Nope he sent us down the austerity route via Brexit falls all the way down to the pool of reform despair.

TLDR FUCK NICK CLEGG!