The mantra of the Coalition’s marriage has been restoring economic credibility. This was its raison d’être and whether they like it or not, it is still the test by which it stands or fails.
Back in 2010, things were desperate enough that a Conservative  leader was willing to wager Britain’s first-past-the-post electoral system to secure power. For many of his own backbenchers it was a step too far, but they were mollified with appeals to the national interest and the desperate state of the country’s finances.
On the other side of this strange pairing was a party known for its statist views at the grassroots. Not to mention its focus on pouring more public money into public services. Again, the Lib Dems were appeased by the notion that there was something noble about putting aside party interests and working to set Britain to rights.
The Conservatives believe the public think they are doing well on welfare and education reform, and indeed they are, but this will