Should there be a free access to all museums worldwide?

In an ideal world, museums across the world would be able to open to the public to peruse as they will, free of charge. Museums are a place to learn of our heritage, to understand different cultures and to showcase incredible research on all subjects from specific areas of our biology to rocks. However, to keep a museum open, it requires a lot of upkeep and a lot of money. Cleaners are needed, security is needed (for example to ensure valuable artefacts or artwork remain in the museum) and we need those in the know to write information sheets with different translations. That's aside from any utility bills. If we do not charge for entry to museums, this money needed to keep the museums open would have to come from somewhere. If visitors don't pay, the likley fall back would be to governments - and with the vast amount of museums there are, this would be a hefty bill to balance alongside the likes of healthcare.