I used to work in debt collection for an electricity company where we had the power to write off debt if we had good reason to, however the Council Tax is a tax you can't just write it off because someone hasn't paid their bill. I really wish we could in some cases.
Where I worked, we bent over backward to help people with payment arrangements. There are a set number of letters that go out depending on circumstance but it would be a reminder, (a second reminder only if the payment was brought up to date but you only ever get the reminder once, if you fall into arrears again it goes straight to final notice.)
Yes the irony of not being able to pay £150 and now asking for £900 is not lost on council tax workers. But if you keep failing to pay we have to do something to collect it in. The liability order that is obtained through the courts grants power for collection.
If you fail to pay your electricity bill a prepayment meter is fitted that forces you to pay the debt back. You can't do that with council tax and if we didn't get it all in by 1st March the new year's bill rolls round and we start again with a higher council tax bill. If people were struggling before then paying two lots is not going to be easy.
I understand why people get upset with bailiffs, but until you have seen CAB financial breakdown statements where people genuinely list full sky package, drinking and smoking as outgoings you realise that some people do not prioritise it.
If you cannot pay the full amount due for that month on your council tax for God's sake ring them and pay something, anything you can toward it, that way as a person taking the call I can see that you are trying and we can hold reminders for a bit etc but please call.
I also used to deal with all the bankruptcies cases. You are not alone, several people a week if not daily are made bankrupt. All we do is close that account down, start a new one. We are not judging people, we are just trying to do our job of collecting money in. We aren't exempt from paying it as employees 
The liability order is a back up plan if you make a payment arrangement and don't stick to it. It is an insurance policy, we have the right to ask for your employment details and take it directly from your salary if you fail to pay. It is a set % amount and IMO too fucking high and councils can run 2 (or used to it is a very long time since I did this job) attachments at a time.