Take for example tax avoidance, anyone can do it, if they read up on it and use the same methods. If enough of the mass population did this, then things would "have" to change and the problem may get solved. But those who are not avoiding tax legally whine about those that do because they don't have the compulsion to learn it for themselves and expect to have it handed to them.
Anyone is capable of avoiding tax using schemes like ISAs.
Not everyone is capable of avoiding tax using borderline-lawful off-shore schemes. Do you think that Gary Barlow did his research or do you think that he paid an accountant lots of money to advise him? Are these schemes possible for those paying tax through PAYE?
The government could certainly do more to close down these loopholes but it isn't as easy as most people think. Often international cooperation is needed. There's also a lot of money to be made in finding loopholes.