not true pal, if you have kids or are single or some other situations you are entitled to claim back some of your tax money as tax credits, in the form of working or child tax credit, when we had our little girl my wife could only work 2 days a week and applied for them, as she had worked she was entitled to some money, as was i for having a child i get back tax each week
everyone situation is different and the more you earn the less you get, but its worth finding out
People have a negative opinion of it, but its only getting back money you put in, and how many people do a cash in hand job..... at least tax credits are 100 % legal !
Just be careful also that if you are self employed they base your earnings on your estimate, and if you earn much more you can owe the money back, so you have to be keen to keep them upto date with your details