Ah, but they are doing it, in slow motion. Through socialism, they keep adding burdens to the productive members of society, they force those members to work harder which makes it difficult to replace themselves over time. The socialists, by favoring the underclasses makes it easier for them to reproduce and eventually be able to outvote and enslave the productive members, mainly whites.
You are correct. You have probably seen this:
Ineptocracy:............... ....... A system of
government where the least capable to lead are elected by
the least capable of producing, and where the members of
society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated
wealth of a diminishing number of producers.