That has been one of many failures of the Dems to both pursue and socialize.
When people talk about government waste, what they really are talking about is things the government does which they don't approve of. E.g. ICE--is that wasteful spending? Depends upon whether you like ICE or not. Aide to Israel? Same stuff.
That's why DOGE got nowhere. There is no mythical mammoth waste, fraud, and abuse in the government.
Oh, and stop or limit research into anything not centered at white men.
They've also been the only party to have successfully reduced the cost of government and made it more efficient in the process. Clinton's bipartisan National Partnership for Reinventing Government was what DOGE claimed to be, as it sharply cut the number of federal government staff without affecting delivery. [0][1]
Obama and Biden were less effective than Clinton, but still drove the deficit down toward the end of their terms, and Obama in particular tried to implement a series of reforms to improve efficiency such as creating 18F which saved a bunch on government software contracts in the years it was active. The Republicans have not seriously done anything similar, and DOGE doesn't count because from the start it was clear it wasn't a serious attempt to reduce actual waste but an ideologically-motivated exercise run by unskilled and inexperienced people.
This isn't to say Democratic administrations have been all good or that the Democratic Party hasn't also loved its pork, but overall at least when in control of the presidency the party has tended to stabilise America's finances, improve tax revenue collection, make government more efficient, and reduce deficit spending far more than the Republicans have.
The Democrats retain at least some elements of their technocratic side, but the Republicans have gone all-in on populism and thrown theirs out.
[0] https://en.wikipedia.org/wiki/National_Partnership_for_Reinv...