There are a whole range of visa options especially for over 50’s many folks with retirement visa are only here for 6 months a year, otherwise there is DTV which covers most needs, however both require some level of financial means as they don’t want visitors being a drain on the state especially when it comes to medical care…..they are not really out of line with many countries around the world, try getting into Europe of US legally without a visa, same goes for Singapore, Malaysia etc etc
folks spending months at a rime here are not tourists, they are gaming the system……there are appropriate visas to meet needs of all categories of short term and long term visitors - visa exempt is being roundly abused…
They tend to provide a polite warning first, unless abuse is clear and obvious - the ETA can’t come soon enough will put people’s minds at rest before they travel and eliminate all the so called “scaremongering”