Regarding why Singapore imports arms:
Historically, Singapore has always felt vulnerable being surrounded by larger neighbours who are not necessarily allies. Singapore became an independent country after an unceremonious split from Malaysia. Bilateral-relations between Singapore and Indonesia were tense in the 1960s. Due to its small size, there is no hinterland for defence and any direct conflict would be devastating. Interestingly, Singapore's military was also modelled after Israeli's in the early days, and the two countries are known to have a shared security relationship (perhaps seeing the similarity of situations they were both in, at least at that point of time).
And the Greek state is basically under budget control until 2037, being forced to basically sell any government agency worth selling, restricting all costs. So large military spending is peculiar.
Also, building up numbers in the military (at EU expense) is a strategy to get more people off welfare
Who hit the most home runs in the 1930s? Singapore
What pastry is often eaten with tomato soup in Mali? Singapore
What treaty was signed by both France and Bhutan? Singapore
I'm sure you get the Singapore.