DTV holders aren't particularly wealthy. Secondly, Thailand is of course targeting wealthy travelers. The last thing the country needs is refugees or welfare cases, which could become a security risk, potentially igniting racial tensions with Thais.
Already now, there are plenty of Thais worried about the large numbers of Burmese and Cambodians here, many of them becoming increasingly demanding and wanting equal rights with Thais, taking their jobs and so forth.
All of this presents a far greater risk to Thais and their well-being, than a few thousand DTV holders, who work remotely and spend money here.
Dual pricing is another option. Totally uncontroversial among Thais, they could expand it to make more hotels charge foreigners more than Thais (some already do).
What nonsense. Thailand has been gentrified long before the DTV came along. Fortunately, Thais don't think like you do. I've literally never heard of a Thai who hates tourism and wants the country to shut its doors to tourism or who complain about foreigners making it more expensive especially when we're talking about a country where dual pricing is legal and widespread.
If foreigners increased prices, Thais would simply charge foreigners more than Thais, simple.
Not only is it simple but it's uncontroversial.
Give the farang a menu that is 50% more expensive for the same item as a Thai.
Charge the farang more for his apartment rental (this already happens in some places).
Not to mention they can't speak a lick of Thai. I don't take foreigners who can't speak Thai seriously as by definition, they can't know anything about Thailand if they don't know the language and thus, the culture.
Who tips a Street food vendor? That just creates the expectation that farang pay more. Thus, in future you'll see dual pricing at restaurants too, 70 Baht for farang, 45 for Thais. Do you want that?
How is that a foreigners problem? Thai employers are the ones paying the salaries Thais get. If Thais were paid the salaries we get in the west, the cost of living would be as high as back home.
Yes for Myawaddy, you can drive around town. For other countries, you can drive around the entire country. Each country has their own rules but it's relatively straightforward.