First of all, I'm not British, so I only meant this as an outside observation. I'm Canadian, so certainly well versed in the realities of Westminster politics.
Second of all, as much as Cameron may be far from ideal, I don't think he's any kind of Palpatine. As much as anything, he's been delivered the fruits of the Labour meltdown in Scotland which began in 2010 and now appears to be permanent.
I do think that the specter of a Labour government reliant on the SNP disturbed a good many English, and I think there are reasonable grounds to argue that, for England, the idea of a Devo-maxed Scotland still able to push English MPs around on matters of largely English concern demonstrates fundamental inequities. And before we all forget, it is Labour, as much as anyone, who created this dilemma by dealing with the Scottish question, and going out of its way not to deal with English question.
At any rate, British voters had their chance to pick a new electoral system that would have made the ability of any party to form government with less than even a 40% share of the popular vote far less likely. They rejected that. Coupled with what looks to be a permanent break with Labour in Scotland, and the phenomena of UKIP actually stealing more Labour votes than Conservative votes in the North, the Tories probably have a good chance of repeating the 2015 election again, providing they don't go completely off the rails. And that will moderate them as much as anything. Their first majority in 23 years is not something they're going to be keen to throw away on a pack of Thatcheresque exploits.