Thailand is not in a position, where they can select, who they would like to spend their holiday here. In my universe all tourists should be treated as quality tourists. If the tourists are being are treated good and fairly, they may even consider to return again one day, or spread heartwarming words to their friends about Thailand.
Thailand do have quite a few quality resorts and hotels which could attract rich tourists, but as soon as they leave the gated premises, the real Thailand hits them right in the face. Taxi- and TukTuk scams, double pricing, pollution, garbage and dirt everywhere, unfriendly agressive locals and harassing sellers and touts everywhere. Off course not all Thais see tourists as cash cows only tolerated because of their money, but in general there will have to be an attitude adjustment to take place, before the tourists all can leave happy and satisfied. What happened to the Thailand we used to know as "The Land of Smiles"? A true smile has to be from the heart!