That wouldn't necessarily mean companies would be paying more or less, just that the channels through which the taxes are paid have changed for the sake of efficiency and simplifying an unduly complex system.
"Competition between providers of movie services on pay TV has changed materially and, as a result of these changes, consumers now have much greater choice," said Laura Carstensen, chairman of the movies on pay TV market investigation at the Competition Commission.
However, what we do and do not pay a living wage for has changed over time.
With the rise of the Internet, the relative affluence and sophistication of people willing to pay for sex has changed significantly, and so have their expectations.
Most politicians in Bucharest and Sofia, the capitals of Romania and Bulgaria, habitually complain that they are ignored unless it suits the West suddenly, in crises such as the one over Kosovo, to pay them attention.Kosovo has changed all that.
The rate of pay for writers has changed very little since the 1950s.
So in addition to the pay cut, the company has changed its policy to encourage workers to visit doctors less often by charging them more money when they do.
In the 50 years since the enactment of the Equal Pay Act, a lot has changed for women in the workforce.
Earlier this year the government introduced fines for employers who don't pay up, but very little has changed.
That so much scrutiny has fallen both on how Mitt Romney earned his fortune (in the ruthless world of private equity) and his tax rate (15%, less than what some middle-class families pay) is a sign something has changed.
