1) Offer loads of free stuff 'because we are the 5th largest economy in the world'. (Food banks blah blah, housing crisis blah blah, our NHS bing sold off blah blah etc)
2) Find that on taking power you are unable to hand out free stuff 'due to failures of capitalist system'.
3) Replace Capitalism with ownership of property and means of production to be held in common overseen by Peoples Commmisars selected from proletariat.
I can't see how this can possibly go wrong!
http://www.marxist.net/namechange/transitionalprogramme/
N.B. Every penny someone receives but did not earn, someone else earned but did not receive. There is no such thing as government money.