Just because a group of people aren't part of a labor force doesn't mean there's a lack of labor force...
1. What makes you say people just collect and do nothing? Sounds very subjective. I've collected "entitlements" when my business was struggling due to the extreme language laws in effect in Quebec (choking out the English business owners), and I quickly sold my business and got a job thanks to these handout's/entitlements. I have no doubt that some people do collect and do nothing but it's their loss if they want to live their life doing "nothing", and I think they will be full of regrets. What's the point of judging these type of people (who collect and do nothing)?
2. Again what makes say that people who collect do nothing? I have a minister friend (I'm Atheists btw) who works for free and donates his time, and he collects these "entitlements". His children have Ph.D.'s and the Minister has earned 3 Ph.D.'s himself. Another thing that should be taken into consideration is that these people have more time to spend to properly parent their children. Rather than rely on a daycare to caretakers to impose their own values.
3. So people collecting "entitlements" don't pay sales tax's, tickets, utilities, or bill's? Come on who you trying to fool the government covered their bases before even planning to give handouts. That's why the sales tax is %15 where I live so they can capture the revenue from all the handouts/entitlements...
4. Those who collect entitlements/handouts value the money less because they didn't have to earn it so they spend it more (there's also laws in place preventing them from saving up the handouts/entitlements, to ensure the money is circulated). I'm sure if you ask a banker who saves more even if they have the same yearly income the worker will save more money than the guy getting handouts.
To answer you question "why should we pay people to do nothing???" because money has no real value and it doesn't belong to anyone so the government isn't losing anything by paying them money, in fact they are building voter confidence and controlling the populace (stability) at little to no resource costs (normally it takes guns and war to do this we just print more money or add more digital funds into an account, and adjust with more inflation).
I could rant all day about "teach a man to fish feed a man for life" because to me that saying is no different than my Grandfather teaching me how to play the stock market when I was young. Now that I have the tools/knowledge, money is a joke to me. Money; it comes, it goes, and it flows like water just gotta go down to the river and get some (put forward some effort) as it's not on tap for citizens like it is for the governments that control the currency's and the resources.
I'm not trying to argue or prove anyone right or wrong but what would it solve to stop giving people who need it the support they need? You can't make someone do want they don't want to and give them freedom (can't have your cake and eat it too), so they've made an industry of this (smart move IMHO).