"hard-up people"

[Odessa Dawn]

But critics pointed out that the energy firms will simply raise the price of their cheapest tariffs, hitting vulnerable people even more. And there was further bad news yesterday for hard-up people strugging to meet rising energy costs.
A spokesperson from Barnardo’s said the government’s proposals on prices don’t go far enough. “Fuel tariffs need to be cheaper for those on low incomes. The current measures will do nothing to help the poorest families unless fuel prices fall.”

More: Energy plans won
"Hard-up people," "those on low incomes," and "the poorest families" are different definitions with the same meaning, aren’t they?

[SoothingDave]

Yes, all of those phrases refer to the same group.