If you are minimizing the amount of money you spend while doing remote work, you may well be on the "wrong" side of this balance, from a revenue point of view.
It's reasonable to expect you can find individual tourists who use more in infrastructure than they contribute to the local economy - the system doesn't break down so long as the average case means overall it is significantly net positive.
If "digital nomads" are net negative, then I expect you'll see eventually constraints arise. Assuming long enough for a) local governments to figure this out and b) that it's a big enough impact to care about. It's also plausible that "digital nomads" remain such a small number of people that nobody is really fussed about the impact, and the legalities of what they are doing remaining fuzzy is only used as a justification to refuse visa/entry to anyone who has proved annoying to the people who issue same.
German speaking countries do tax tourists.