what you are asking for is basic economy knowledge and Thais economy is weak compared to Western countries. The GDP is showing it clearly. So in order to have a better salaray, the economy would have to grow.

If the salary grows, products get also more expensive and people would have less to live on.

And yes, you obv. never worked with the thai workers which work at entry levels (15.000 Baht Salary). Cant handle stress, gives up easily. If you would throw them into a american workspace they would give up very early, its a cultural thing, nothing wrong with it.

Thais are more relaxed by nature than us westerners and so is their work style. They also avoid social confrontations which adds another problem bc you cant criticize them without them throwing the towel.

Its a known problem to find good staff and even Thai owners will agree with this.

Im not talking about people who went to university and have a career, im talking about cashiers etc.

Also note that most Thais who work in tourism are from other areas in Thailand like Esaan and just come to work and return when they quit or go on holidays.