Krasny: I didn't say they advocated an 'unholy alliance', but they were emphatically in favour of the bourgeoisie against the aristocracy (hence their position over Poland and over Ireland). Further, Marx often commented that he favoured free trade because they too would help develop capitalism and thus speed up the onset of socialism. Yes they shifted tactics many times, alliance with peasants being a leter position.
Barry: I doubt there will be free loaders, because not working is really, really boring. Further, lets note that: "From each according to ability" implies as much inequality of work, as "too each accrding to their needs" implies an inequality of income.
There is no longer much need for a socialist revolution to strive to increase production, because capitalism already has enormous productive cpacity, all we need to do now is set the social relations of consumption straight. Further, check out the prefaces, Engels explicitly states that the programmatic element of the manifesto didn't apply any lnger (by the 80's), and was subject to change.