The problem is that power does not relinquish power without resisting with all it has. So since the problem is capitalism with its private ownership and control, –all for private profit, any concessions that interfere with that power or that profit and wealth will be eventually eliminated by the "powers that be". This has been proven by the experience of the USA after FDR brought us The New Deal with all its socialistic-type programs for the people. As soon as it was in place, the right began attacking it in every way possible, chipping away at it relentlessly, developing scary and worrisome propaganda to fight it, passing sneaky laws and blatant laws to undermine it all, bit by bit. It was necessary from the start to constantly fight to keep what was won, and eventually the people lost due to the sheer power and wealth of the opposition from the right. So Lassalle, who died at age 39 and had little of his own analysis and theory, preferring to advance those of other thinkers with whom he agreed, promoted ideas that would eventually fail due to the powers arrayed against such reforms.
Lassalle was a small-time figure who was no challenge to the intellect, insight, and prolific thinker and writer, Karl Marx. And so any time anyone raises principles of socialism, the right always goes straight to a criticism of Marx. They see Marx as the source of such ideas. But no matter who you may credit with concepts of socialism, if the capitalist class ultimately remains in control, there is no end to worker exploitation. But in the end, capitalism will collapse under its own weight when its strengths and advantages are sapped and worn out, and we see that happening today in the U.S.
The problem is that when capitalism inevitably collapses, it descends into totalitarianism, oppression, and intolerable conditions. At that point, without strong and large political power and organizations, the working class and people in general are impotent to deal with their oppression. Then disorganized rebellion will happen and will be easily and ruthlessly crushed by the totalitarian forces of the capitalist class. Hence it is necessary to act now to organize, to change the economic system bit by bit, and raise up strong politicians who support such changes.