My opinion:

Telegraph just dosent get it. No one pays tax on savings.

Yeah they get it they just intentionally mislead in the title. Tax is paid on the income savings earn. Not your savings.

But the Telegraph has no interest in arguing why those who can afford to save should get that extra income tax free. When they know full well it helps the economy more when it is spent or invested in other ways.

Putting money into savings only helps the bank. It is safer for the saver. But only to a very limited point the best investment for them.

This is why ISA have always had limited maximums and often encourage investment with some risk. Rather then supporting a tax free passive income alone.

Any form of passive income can only be beneficial to a society as a whole. If the recipient is encouraging growth in the form of income for the rest of society iE jobs/inferstructure/or risk based investments. (At least assuming we stick to fiat based currency. )