They couldn't offer it at the recent budget because we were in recession.
But by October public services will be running wonderfully and will actually benefit from having less long term investment.
Combine that with a big medal haul in Paris (one in the eye for the Frenchies), a few football wins (must be some footie over the summer right, just don't let the players or managers speak), a royal baby (if not actual baby at least start some rumours or suggest Harry is coming back to nick the crown or whatever) and Bada Bing!
We will have all forgotten about Austerity, Brexit, social care reform, levelling up, the justice system, the SEND system, our bankrupt councils, the Tory infighting and the racist donors.