I think Truss in particular is really two faced like Boris, she will create/change policy on the hoof depending on the needs of the electorate she is gunning for.
So for now, its all about tax cuts, helping the rich save more of their money and helping businesses, etc.
Once she is elected than her main concern will be coaxing the middle class. So she will go into handout mode, despite telling the party members she won't do that.
I don't think she wants to do it, but the situation is going to be so dire to her electoral chances down the line she will HAVE to do something else.