Younger employees in serviced offices in Cardiff could be some of those that are said to find it difficult to save money for retirement.
Robin Ellison, partner for commercial law firm Pinset Masons, said: "It is not possible for anyone aged 20 to think about how they are going to live in 50 years' time."
He advised the government to consider ways to counteract this, such as by informing the public that every £1,000 put in a building society will provide an income of £1 a week as a pension.
This is one of many ways to make retirement saving easier to understand, he said, adding that the rules surrounding it should be "drastically simplified" for this reason.
However, Mr Ellison pointed out there will soon be a large population of pensioners with no money, which will spur younger individuals to start putting cash aside for the future as they decide "they don't want to live like that when they get old".
His comments follow research from Prudential, which found 43 per cent of retired individuals spend their money cautiously.
