At the end of the day, we don't currently need more "People", we need more "workers" to do the work needed and to pay taxes etc.
The last thing we want is more "people" who are economically inactive for whatever reason.
In the short term, we need all efforts to get those who can work, into work, whether the young, old, new parents, disabled, early retirees who could work, etc. Obviously the very young, the very disabled, and the very old can't work. But there are lots of people who could work, could work more, could pay more taxes, etc., but currently aren't doing.
That's what efforts need to focus on. Better education, better job related training, a tax/benefits systems that encourages and facilitates work, better policing of the black economy to reduce the number of fraudsters wrongly claiming benefits and evading taxes, etc.
Go back a few decades and it was "OK" for people to live on benefits because of the high unemployment. But nowadays, there are job shortages literally everywhere, in all kinds of trades, professions, vocations, etc., so it's time to stop being soft and really start to hit hard on those who could work but choose not to, and also on the fraudsters who are evading tax and wrongly claiming benefits. Alongside that, we need to have a proper review of education and job skill training, which, again, has lost it's way - what was "fine" 20-30 years ago isn't fit for purpose today!