In this case, Conservative politicians can sidestep the thorny issue of gaping economic inequalities. “Levelling up” implies improvements for the needy without any redistribution of wealth or opportunity from the wealthiest. This, by definition, is impossible.
Back in 1750 the GDP per capita for the UK (from Angus Maddison’s numbers) was around $1,800 a year. Today it’s around $39,000. Yes, that’s after accounting for inflation.
It would appear that the economy is not a zero sum game.