A part are mentally retarded. A level 13 troop of gold in the store can cost you 300 euros, but with the guard towers you can train the same troop in 3 days. The cost of the objects, the experience, and the resources of the power abilities in the store do not have that value in reality. Who will spend 30 euros on 8 magic points if in the void you can get the same in 3 or 4 days?
It's a classic pay2win model. There are many cost effective ways to spend money, up to a certain point. You can put in a lot of time, and with patience and clever spending, accomplish quite a bit.
The more you spend, the more cost ineffective it becomes. So sure, someone can rush their garrison out of hospital 4 times in a row, but they are dropping a thousand dollars to do it. Someone can buy all the research and boost in the store every rotation, but only buying the 70% off is more cost-effective. Someone can buy everything in the shop, or they can simply buy chests in a very ineffective way (even the good ones). This method worked fairly well on most servers, but with the merges, those few servers ruined by totally uninhibited spenders are now the cancer that kills an entire server group.