The chancellor said Labour had had to make "difficult choices", but she believed the economy was now "on a strong footing".
Asked if she could rule out putting up more taxes during this parliament, Reeves said she was "not going to write four or fives years' worth of Budgets" on the programme.
However, she said that Labour's pledge "not to increase for working people the key taxes they pay - income tax, National Insurance and VAT - that is a commitment for the duration of this parliament".
Also on Laura Kuenssberg, Badenoch said the Conservatives would be thinking about the economy "in a different way", which would be "completely the opposite" of what Labour was doing.
She criticised the rise in employers' NI contributions as being "not coherent" as most of the increase would be passed on through lower wages and higher prices, but she did not say whether or not she would reverse it.
However, Badenoch did say she would reverse the VAT hike on private schools, calling it a "tax on aspiration that won't raise any money".