The origin of copyright was providing monopoly rights to the Stationers Guild in Britain to control printing of works under the Licensing of the Press Act 1662. So a right vested in the printers who wanted to be able to sell for much higher prices than the duplication itself justified, not the authors.

Of course this would also allow them to pay more to authors, because they would be able to amortise it over more copies, but the guild had a monopoly on printing, so it was not in any of their interests to substantially increase the proportion paid to authors - the main benefit of this monopoly was to themselves.

When parliament refused to renew it after protests because of the censorship it authorised, the Stationers Guild kept trying to push for it to be reintroduced, and first then started pushing the "authors rights" angle, leading to the Statue of Anne (Copyright Act 1710), which was the first "modern" copyright act in that it vested rights in authors.

But the idea of restricting the ability to copy to favour the creators of a work was something the printers first started pushing for their own interest because their abuse of the copyrights previously granted to them directly made it unpalatable to re-authorise those rights.

If copyright law wasn't serving the interests of Disney, Sony, and other big corporations, they'd be pressuring politicians to change it, rather than expand it to other countries.