If we can get the vast majority of the country's workforce to improve their productivity 10% faster than the already are, then as some share of that flows through to wage increases above CPI increases we start to increase real wages.
If we achieve this then we can start to support the asset prices at more normal/useful and functional interest rates.
If we achieve this then assuming no more income tax decreases some level of sustainability will be achieveable with Government spending.
If we achieve this then growth can occur without more debt.
This all relies on better productivity starting at each and every individual.