Will this change? It's already changed a little bit, and it will probably change a bit more, but it will take a while before there is acceptance for even the amount of night jobs in the US, in my opinion. I believe that working at night is considered unpleasant and therefore people who work at night get extra pay (Jouke or ar0n would be better at verifying or refuting this). It just costs more to have people work at night (you need more lighting as well).
But the main reason shops aren't open at night is that it isn't seen as fair and isn't allowed without a special permit. It's thought that if large supermarket chains can be open all night, smaller grocery stores wouldn't be able to compete (which is probably true). It's also thought that if smaller shops were forced to close it would be a loss to the community. This viewpoint can also be seen in the US: for example, many communities have objected to the establishment of Barnes & Noble bookstores on the grounds that the company deliberately pushes local bookstores out, thus robbing the community of the culture surrounding these bookstores.
The future could hold a 24-hour monoculture. But it might not.