The thing is, if all these people "got off their backsides, and achieved" then the world would essentially grind to a halt. Who would stack the shelves in the supermarket? Who would load the luggage on to the planes at the airport? Who would process the invoices for all the "achievers"?
What would happen if developing commodity exporting countries, and the workers within those countries working for peanuts because they don't feel they have another choice suddenly realised that they're being bent over, and actually started charging a more appropriate price for their labour, commodities?
The fact is, big business needs a significant amount of unskilled labour to pick from to exploit. It needs a high level of poverty, and corruption in developing countries to keep their import costs down.
Governments need people on welfare to buy votes. Big business needs government, to be able the pass legislation that favours their interests.
There're are definitely people in society who are parasites, and exploit the system, but many of those people are the ones who designed the system in the first place.