stealth tax

The policy is known as a hidden tax rise or stealth tax, as it takes effect over time as people are dragged into paying more tax as their pay goes up, without the tax rate rising at all.

This is often dubbed a stealth tax - as governments don't explicitly label it as a tax.

"Am I going to see tax on my pension contributions, any kind of stealth tax?"

One option is though what has been dubbed a stealth tax - a means of raising revenue which is not explicitly labelled or intended as a tax.

At the time, this was denounced by the Labour opposition as a "stealth tax".