There are plenty of negatives to this - normal regional market forces are upset.....
Firstly they upset the price of land and housing (rents even) make difficult for locals
to own or rent housing or farmland.
Um, no. When it comes to land for housing it's effectively infinite. Farmland perhaps not, but keep in mind that foreigners simply cannot own land in Thailand, so the Thai wife owns it. And she IS a local. The only difference is that it's likely a person who in other circumstances wouldn't be able to own land. So instead of rich Thai business people owning it all, this woman also gets a slice of the pie. I struggle to call that a negative.
What they build is not necessarily good either -
They tend to build exactly what the Mrs. wants. A typical modern Thai home. It also wouldn't surprise me that many husbands who DO get to build what they want then go for a more traditional teak wooden home; very few Thais with money build those because it's more expensive and takes more maintenance than concrete & bricks. Check out the www.teakdoor.com construction forum to see what typical Farang husbands build.
it can impact on an inefficient utilities infrastructure and of course uses possible farmland.
Honestly how much farmland can a house take up. It's not like there's a shortage of farmland in Issan. ;) And basically there are very few utilities that can be used, ineffeciently or not; water likely comes from a well & water tower that you have to build, sewage means digging a cess pit system. Basically electricity is the only utility used.
THe psychological effects of having a wealthy "foreigner" in the midst of a community
can affect male female relationships and the way local businesses conduct their business
- holding out on locals in the hope that the "big bucks" will come from the foreigner.
Sure. Just about any district town will have more (and wealthier) Thais though; they're the people owning the motorcycle & farm machinery dealership, the bank manager, agricultural brokers, the gold shop owners, etc, etc.
In UK in WW2 they had a saying about the US troops - "Over paid, oversexed and over here" -
I;m sure this sort of resentment exists in Issan now.
If it did to any significant degree then why would people want to live there..? People move there (instead of Pattaya) to get AWAY from that mindset.