[Scoundreller]

That solution could be rephrased as:

“Make poor people poorer”.

The price increases won’t impact the wealthy, even if they did have to reduce their travel by 10-20%. But it will impact those that save (or pay-off) for years for their dream trip or honeymoon trip.

My preferred approach would be more progressive than regressive: just make rich people poorer through income/capital/dividend taxes.

[socrates1998]

If you are poor, should you really be going to Venice?

A reasonably priced lottery would give middle income people access and an even playing field against wealthy people.

This system, combined with a limit on tourist infrastructure would cut down on excessive visitors and make it sustainable.