There are some people on what is called zero-hours contracts and doing part-time work and they don't earn enough money to buy some of the essential things in life.
Of course, there's a limit to how much the government can cut taxes: at a zero tax rate there is no tax revenue regardless of how much people are working.
In Britain the share of full-time workers on a " zero-hours contract" , where there are no guaranteed hours, soared after the financial crisis but is now falling.