The sterling fall to the lowest rate for 30 odd years is the risk to growth: if the market does not buy the Truss plan and the cost of borrowing goes up then, yes, all bets are off. You are also right that the neo-liberal chicken is coming home to roost in the UK as the chart below indicates. But, the fact remains that Truss is offsetting money that households would have been forecast to have to find. More money in the system - despite the issues you identify - almost (in the short term) produces growth and the sums here are staggering.