For another, they don't pay much in taxes. My relatives in PA get red in the face whenever you bring up the Amish, because in that area the county relies heavily on taxes levied on your electric bill. The first thing the Amish do when they move into the neighborhood is rip out the electric.
The other thing is there are dozens of sects people lump together as The Amish, and they all have different doctrine. Sometimes very different.
Two, $50/month is a lot of money in rural PA.
Sure they should pay for public services they use, but what more are you asking?
How far back?
50% of your children dying before 4 back?
No antibiotics back?
No dentists all teeth gone by 35 back?
Slavery is legal back?
We as humans have a very good skill at seeing the good things about past times and glossing over the not so good parts.
It is funny you say that because the Amish and Old Order Mennonites in my area are moving away because farmland is out of reach for them.
* Farmland saw the perfect storm of record high food prices and record low interest rates around the end of the 2000s, so people went spend-crazy, resulting in as much as 500% growth in price in the last decade. They haven't yet come back down from that.
* That, of course, also brings out the speculators, so it is not just farmers who are buying.
* Certain types of farmers are given special market advantages by my country's government, so they tend to make more money than most other farmers, providing them with more money to put into land.
It is tough for the Amish to compete with any of that.
After growing up in the modern world under constant surveillance, housing prices out of reach, taxes for wars abroad I don't want, and "Equihacks" I find myself yearning for the days of old.
(Would keep the antibiotics of course.)